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Multitargeted analysis for the simultaneous determination of organochlorine pesticides and polychlorinated biphenyls in sediments exploiting comprehensive two-dimensional gas chromatography coupled to mass spectrometry 综合二维气相色谱-质谱联用技术用于沉积物中有机氯农药和多氯联苯的多目标分析
IF 3.2 Pub Date : 2025-08-07 DOI: 10.1016/j.jcoa.2025.100245
Allan Polidoro , Valentina Costa , Monica Romagnoli , Elena Sarti , Claudia Stevanin , Cinzia Fabbro , Luisa Pasti , Flavio A. Franchina
Persistent organic pollutants (POPs), including organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs), remain a significant environmental concern due to their persistence, bioaccumulation, and toxicity. Accurate quantification of these contaminants in sediment matrices remains analytically challenging due to the complexity of the matrix and the need for detection at trace levels to meet regulatory standards. This research focused on the development and application of an analytical protocol for the simultaneous determination of OCPs and PCBs in sediments using solid-phase extraction (SPE) followed by comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC×GC-TOFMS). The developed method was validated, achieving low limits of detection (0.4 to 14 ng kg-1) and quantification (1.1 to 41 ng kg-1), with satisfactory linearity (r² > 0.99), accuracy (90–110%), and precision (RSD < 5%) for all target analytes. Validation with certified reference material confirmed the agreement between experimental and certified concentrations for most compounds. The protocol was applied to environmental sediment samples, detecting multiple PCBs and DDT-related compounds at concentrations below international guideline values. These results confirm the method’s suitability for trace-level determination of OCPs and PCBs in sediments, addressing the analytical demands of environmental monitoring and regulatory compliance. The established protocol enables sensitive and reliable assessment of sediment contamination, supporting a simultaneous ongoing surveillance and risk assessment of such classes of persistent organic pollutants in the same analytical run.
持久性有机污染物(POPs),包括有机氯农药(ocp)和多氯联苯(PCBs),由于其持久性、生物蓄积性和毒性,仍然是一个重大的环境问题。由于基质的复杂性和需要在痕量水平检测以满足监管标准,对沉积物基质中这些污染物的准确定量分析仍然具有挑战性。本研究的重点是开发和应用一种同时测定沉积物中OCPs和pcb的分析方案,该分析方案采用固相萃取(SPE)和综合二维气相色谱-飞行时间质谱法(GC×GC-TOFMS)。验证了该方法的低检出限(0.4 ~ 14 ng kg-1)和定量限(1.1 ~ 41 ng kg-1),线性良好(r²>;0.99),准确度(90-110%),精密度(RSD <;5%)用于所有目标分析物。经认证的标准物质验证证实了大多数化合物的实验浓度和认证浓度之间的一致性。该方案适用于环境沉积物样品,检测浓度低于国际指标值的多种多氯联苯和ddt相关化合物。这些结果证实了该方法适用于沉积物中痕量OCPs和多氯联苯的测定,满足了环境监测和法规遵从性的分析需求。已建立的协议能够对沉积物污染进行敏感和可靠的评估,支持在同一分析运行中同时对这类持久性有机污染物进行持续监测和风险评估。
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引用次数: 0
A tutorial on the synthesis and applications of molecularly imprinted polymers in analytical chemistry 分子印迹聚合物的合成及其在分析化学中的应用
IF 3.2 Pub Date : 2025-07-28 DOI: 10.1016/j.jcoa.2025.100244
N.P. Kalogiouri , A. Kabir , K.G. Furton , V.F. Samanidou
Molecularly imprinted polymers (MIPs) have emerged as highly selective sorbents with tailor-made recognition sites complementary to target analytes in terms of shape, size, and functional groups. This tutorial provides a comprehensive overview of the principles, synthesis strategies, and analytical applications of MIPs, with a focus on their utility in sample preparation, separation, and detection. Various imprinting techniques—such as bulk, surface, and nanoimprinting—are discussed alongside advances in green synthesis and novel monomer-template systems. Emphasis is placed on the integration of MIPs with chromatographic and spectrometric platforms, particularly in complex matrices relevant to environmental, pharmaceutical, food, and clinical analysis. The tutorial illustrates the practical considerations for designing and optimizing MIP-based methods, including template selection, polymerization conditions, and reusability, reflecting recent and relevant advances of the last ten years This tutorial aims to guide researchers and analysts in leveraging the unique properties of MIPs to enhance selectivity, sensitivity, and sustainability in modern analytical chemistry.
分子印迹聚合物(MIPs)已成为高度选择性的吸附剂,具有定制的识别位点,在形状、大小和官能团方面与目标分析物互补。本教程提供了原理的全面概述,合成策略,和MIPs的分析应用,重点是他们在样品制备,分离和检测的效用。各种印迹技术-如体、表面和纳米印迹-讨论了绿色合成和新型单体模板系统的进展。重点放在MIPs与色谱和光谱平台的集成上,特别是在与环境、制药、食品和临床分析相关的复杂基质中。本教程阐述了设计和优化基于mip的方法的实际考虑,包括模板选择,聚合条件和可重用性,反映了过去十年的最新和相关进展。本教程旨在指导研究人员和分析人员利用mip的独特特性来提高现代分析化学中的选择性,灵敏度和可持续性。
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引用次数: 0
Quantification of lactate enantiomers in human sweat samples using two-dimensional liquid chromatography 用二维液相色谱法定量测定人体汗液样品中的乳酸对映体
IF 3.2 Pub Date : 2025-07-21 DOI: 10.1016/j.jcoa.2025.100243
Kazushi Mori, Makoto Tsunoda
Lactate (LA) is primarily produced by the reduction of pyruvate in the human body and is crucial for energy production via anaerobic glycolysis. Although the D-LA concentration is considerably lower than that of L-LA, a significant increase in D-LA concentration alone has been reported in some diseases. Quantifying LA enantiomers in human biofluids has the potential for disease diagnosis. Sweat has recently been recognized as a novel biological alternative to blood because it can be sampled non-invasively. Therefore, in this study, heart-cutting two-dimensional liquid chromatography (2D-LC) using a highly sensitive fluorescence detection method was developed for the analysis of LA enantiomers in small amounts of human sweat. LA was derivatized with 4-nitro-7-piperazino-2,1,3-benzoxadiazole (NBD-PZ) and separated from endogenous compounds using an octadecyl silica column in the first dimension. Subsequently, the NBD-PZ-LA peak was fractionated and enantiomerically separated in the second dimension on a chiral column. Sufficient linearities (R² > 0.999) were observed in the ranges of 1–100 and 10–1000 µM for NBD-PZ-D-LA and NBD-PZ-L-LA, respectively. The corresponding limits of quantification were 0.97 and 1.12 µM. The precision values were 1.04 %–12.03 %, and the accuracies were 85.6 %–100.4 %. The developed method was successfully applied to ∼5 µL of human sweat collected from five healthy subjects. The concentrations of D-LA and L-LA in sweat were 30.29 ± 20.18 µM and 23.69 ± 12.15 mM, respectively. The developed 2D-LC system should be clinically applicable to LA enantiomer analysis in human sweat as a non-invasive biomarker.
乳酸(LA)主要由人体内丙酮酸的还原产生,对于通过厌氧糖酵解产生能量至关重要。虽然D-LA浓度明显低于L-LA,但在一些疾病中,有报道称D-LA浓度单独显著升高。定量测定人体液中的LA对映体具有疾病诊断的潜力。汗液最近被认为是血液的一种新的生物替代品,因为它可以无创取样。因此,本研究建立了采用高灵敏度荧光检测方法的切心二维液相色谱法(2D-LC),用于少量人体汗液中LA对映体的分析。LA与4-硝基-7-哌嗪基-2,1,3-苯并恶二唑(NBD-PZ)进行衍生化反应,并用十八烷基硅柱在一维上分离内源性化合物。随后,在手性柱上对NBD-PZ-LA峰进行二次分馏和对映体分离。充分的线性(R²>;NBD-PZ-D-LA和NBD-PZ-L-LA在1-100µM和10-1000µM范围内的浓度分别为0.999)。相应的定量限分别为0.97和1.12µM。精密度为1.04% ~ 12.03%,准确度为85.6% ~ 100.4%。所开发的方法成功地应用于5名健康受试者的人体汗液中。汗液中D-LA和L-LA的浓度分别为30.29±20.18µM和23.69±12.15 mM。所开发的2D-LC系统可作为无创生物标志物应用于人体汗液中的LA对映体分析。
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引用次数: 0
Critical review on the assessments of green metric tools for Olmesartan medoxomil analytical methods: Case studies 对奥美沙坦-美多索密分析方法绿色计量工具评估的批判性回顾:案例研究
Pub Date : 2025-07-18 DOI: 10.1016/j.jcoa.2025.100242
Shaikh Manirul Haque , Abuzar Kabir
Green chemistry metrics can incorporate features of analytical practices that adhere to the principles of green chemistry. Several metrics are available to evaluate the greenness of the analytical procedure, including the AES, AGREE, and BAGI. The current review article outlines the selected metrics used to determine case studies of Olmesartan, employing various analytical techniques, including UV spectrophotometry, HPLC, HPTLC, UPLC, LC-MS, and UPLC-MS, based on specific criteria. These criteria also include the advantages, disadvantages, and limitations of each technique. The analytical eco–scale, AGREE and BAGI values were in the range 79–86, 72–84, 66–68, 77, 75–89, 67–75; 0.6–0.71, 0.55–0.65, 0.58–0.65, 0.62, 0.65–0.66, 0.68–0.69; 77.5–82.5, 72.5–82.5; 75–77.5, 80, 75 – 80 and 80 respectively for UV spectrophotometry, HPLC, HPTLC, UPLC, LC-MS and UPLC-MS. The results are well-organised according to the criteria and have produced an excellent greener methodology. The new researchers could understand and use all the assessment tools for different purposes. Additionally, they can utilise it to develop new procedures, which could demonstrate a greener methodology for quantifying Olmesartan in various matrices.
绿色化学指标可以结合分析实践的特点,坚持绿色化学的原则。有几个指标可用于评估分析过程的环保性,包括AES、AGREE和BAGI。当前的综述文章概述了用于确定奥美沙坦案例研究的选定指标,采用各种分析技术,包括紫外分光光度法,HPLC, HPTLC, UPLC, LC-MS和UPLC- ms,基于特定标准。这些标准还包括每种技术的优点、缺点和局限性。分析生态尺度、AGREE值和BAGI值分别为79 ~ 86、72 ~ 84、66 ~ 68、77、75 ~ 89、67 ~ 75;0.6 - -0.71, 0.55 - -0.65, 0.58 - -0.65, 0.62, 0.65 - -0.66, 0.68 - -0.69;77.5 - -82.5, 72.5 - -82.5;紫外分光光度法、HPLC法、HPTLC法、UPLC法、LC-MS法和UPLC- ms法分别为75 ~ 77.5、80、75 ~ 80和80。结果是根据标准组织良好的,并产生了一个优秀的绿色方法。新的研究人员可以理解和使用所有的评估工具用于不同的目的。此外,他们可以利用它来开发新的程序,这可以展示一种更环保的方法来量化各种矩阵中的奥美沙坦。
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引用次数: 0
Ionic liquids in liquid chromatography 液相色谱中的离子液体
Pub Date : 2025-07-11 DOI: 10.1016/j.jcoa.2025.100239
Sini Santasalo , Susanne K. Wiedmer
The use of ionic liquids (ILs) in liquid chromatography (LC) is reviewed. ILs have several different types of functionalities, which means that they are prone to multiple simultaneous interactions with stationary phases in LC. ILs have been investigated by LC as analytes and they have been used as mobile phase additives and column stationary phase modifiers in LC. All these applications include a diverse range of interactions with different LC stationary phases. Common reasons for using ILs as mobile phase additives have been to reduce unwanted interactions between analytes and free silanols on the column stationary phase, to act as ion pair reagents to separate polar compounds with reversed phase LC, and to act as UV absorption reagents to detect compounds that do not absorb UV light. The review covers the most important works between 2003–2025.
综述了离子液体在液相色谱中的应用。l具有几种不同类型的功能,这意味着它们容易与LC中的固定相同时发生多种相互作用。液相色谱法研究了液相色谱法中液相色谱作为流动相添加剂和柱固定相改性剂的应用。所有这些应用包括与不同LC固定相的各种相互作用。使用ILs作为流动相添加剂的常见原因是为了减少色谱柱固定相上分析物与游离硅醇之间不必要的相互作用,作为离子对试剂用反相LC分离极性化合物,以及作为紫外线吸收试剂检测不吸收紫外线的化合物。该审查涵盖了2003-2025年期间最重要的工作。
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引用次数: 0
A thermodynamic study of relative extractability of ethanol to blood simulating solvent in extractables and leachables analysis of medical devices by Abraham’s Solvation Parameter Model 亚伯拉罕溶剂化参数模型在医疗器械可萃取物和可浸物分析中乙醇对血液模拟溶剂相对可萃取性的热力学研究
Pub Date : 2025-07-11 DOI: 10.1016/j.jcoa.2025.100238
Jianwei Li
A thermodynamic study of over-extraction of blood contacting medical devices by ethanol to ethanol/water binary cosolvent mixture (50/50, v/v), as a blood simulating solvent, in chemical analysis of medical devices is evaluated by Abraham’s solvation parameter model using five representative materials (low density polyethylene or LDPE, silicone, polyurethane or PU, polyoxymethylene or POM, and polyacrylate or PA). The Abraham’s model is initially used to calculate the material-solvent partition system coefficients by the corresponding partition system constants and representative extractables compounds between five materials and ethanol/water (and methanol/water) cosolvent mixtures at different volume fractions. The partition system constants are indirectly derived by a “thermodynamic circle conversion” method, based on material-water partition systems and solvent-water water partition systems. The material-solvent (mixture) partition coefficient, PM/Solvent=CM/CSolvent, defined as the concentration in the material phase divided by the concentration in the solvent phase, is used as an indicator of the solvent extraction strength. log(PM/Solvent) values are computed for all material-solvent pairs using the representative extractables compounds, mostly from Wayne State University experimental descriptor database (WSUEDD). The predictive log10(PM/Solvent) values between LDPE and silicone materials and ethanol/water (and methanol/water) cosolvent mixtures are compared with the available experimental values to assess the model’s predictive accuracy. Afterward, the predictive log10(PM/Solvent) values of ethanol to ethanol/water binary cosolvent mixture (50/50, v/v) are used to calculate relative extractability (RE), as an indicator of over-extraction. Several conclusions can be drawn from this study. First, the predicted partition coefficients are confirmed by available experimental values (LDPE and silicone). Second, the over-extraction of medical devices by ethanol to the blood simulating solvent is less important
以低密度聚乙烯(LDPE)、有机硅、聚氨酯(PU)、聚甲醛(POM)、聚丙烯酸酯(PA)等5种代表性材料为研究对象,采用Abraham溶剂化参数模型,对乙醇与乙醇/水二元共溶剂混合物(50/50,v/v)作为血液模拟溶剂,在医疗器械化学分析中对接触医疗器械的血液进行过萃取的热力学研究。亚伯拉罕模型最初是通过五种材料与乙醇/水(和甲醇/水)共溶剂混合物在不同体积分数下对应的分配系统常数和具有代表性的可萃取化合物来计算材料-溶剂分配系统系数。在物质-水配分体系和溶剂-水配分体系的基础上,采用“热力学循环转换”方法间接推导配分体系常数。物料-溶剂(混合物)分配系数PM/Solvent=CM/CSolvent,定义为物料相浓度除以溶剂相浓度,作为溶剂萃取强度的指标。log(PM/溶剂)值是使用代表性的可提取化合物计算所有材料-溶剂对,主要来自韦恩州立大学实验描述符数据库(WSUEDD)。将LDPE和有机硅材料以及乙醇/水(和甲醇/水)共溶剂混合物之间的预测log10(PM/溶剂)值与可用的实验值进行比较,以评估模型的预测准确性。然后,使用乙醇与乙醇/水二元共溶剂混合物(50/50,v/v)的预测log10(PM/溶剂)值来计算相对可萃取性(RE),作为过度萃取的指标。从这项研究中可以得出几个结论。首先,用现有的实验值(LDPE和硅胶)验证了预测的分配系数。其次,用乙醇将医疗器械过度提取到血液模拟溶剂中,对于极性更高的可提取物不太重要,但对于更多的非极性化合物,例如在log10(Po/w)=10时高达一千倍。第三,这种过萃取还受到物料与溶剂相之间的相体积比的影响。使用小的相比(或大的溶剂体积)可以显著地减少过度萃取。最后,亚伯拉罕的溶剂化参数模型再次被证明是医疗器械溶剂选择和提取的宝贵和有能力的工具。
{"title":"A thermodynamic study of relative extractability of ethanol to blood simulating solvent in extractables and leachables analysis of medical devices by Abraham’s Solvation Parameter Model","authors":"Jianwei Li","doi":"10.1016/j.jcoa.2025.100238","DOIUrl":"10.1016/j.jcoa.2025.100238","url":null,"abstract":"<div><div>A thermodynamic study of over-extraction of blood contacting medical devices by ethanol to ethanol/water binary cosolvent mixture (50/50, v/v), as a blood simulating solvent, in chemical analysis of medical devices is evaluated by Abraham’s solvation parameter model using five representative materials (low density polyethylene or LDPE, silicone, polyurethane or PU, polyoxymethylene or POM, and polyacrylate or PA). The Abraham’s model is initially used to calculate the material-solvent partition system coefficients by the corresponding partition system constants and representative extractables compounds between five materials and ethanol/water (and methanol/water) cosolvent mixtures at different volume fractions. The partition system constants are indirectly derived by a “thermodynamic circle conversion” method, based on material-water partition systems and solvent-water water partition systems. The material-solvent (mixture) partition coefficient, <span><math><msub><mi>P</mi><mrow><mi>M</mi><mo>/</mo><mi>S</mi><mi>o</mi><mi>l</mi><mi>v</mi><mi>e</mi><mi>n</mi><mi>t</mi></mrow></msub></math></span>=<span><math><mrow><msub><mi>C</mi><mi>M</mi></msub><mo>/</mo><msub><mi>C</mi><mrow><mi>S</mi><mi>o</mi><mi>l</mi><mi>v</mi><mi>e</mi><mi>n</mi><mi>t</mi></mrow></msub></mrow></math></span>, defined as the concentration in the material phase divided by the concentration in the solvent phase, is used as an indicator of the solvent extraction strength. <span><math><mrow><mi>log</mi><mo>(</mo><msub><mi>P</mi><mrow><mi>M</mi><mo>/</mo><mi>S</mi><mi>o</mi><mi>l</mi><mi>v</mi><mi>e</mi><mi>n</mi><mi>t</mi></mrow></msub><mo>)</mo></mrow></math></span> values are computed for all material-solvent pairs using the representative extractables compounds, mostly from Wayne State University experimental descriptor database (WSUEDD). The predictive <span><math><mrow><msub><mi>log</mi><mn>10</mn></msub><mrow><mo>(</mo><msub><mi>P</mi><mrow><mi>M</mi><mo>/</mo><mi>S</mi><mi>o</mi><mi>l</mi><mi>v</mi><mi>e</mi><mi>n</mi><mi>t</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span> values between LDPE and silicone materials and ethanol/water (and methanol/water) cosolvent mixtures are compared with the available experimental values to assess the model’s predictive accuracy. Afterward, the predictive <span><math><mrow><msub><mi>log</mi><mn>10</mn></msub><mrow><mo>(</mo><msub><mi>P</mi><mrow><mi>M</mi><mo>/</mo><mi>S</mi><mi>o</mi><mi>l</mi><mi>v</mi><mi>e</mi><mi>n</mi><mi>t</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span> values of ethanol to ethanol/water binary cosolvent mixture (50/50, v/v) are used to calculate relative extractability (<em>RE</em>), as an indicator of over-extraction. Several conclusions can be drawn from this study. First, the predicted partition coefficients are confirmed by available experimental values (LDPE and silicone). Second, the over-extraction of medical devices by ethanol to the blood simulating solvent is less important ","PeriodicalId":93576,"journal":{"name":"Journal of chromatography open","volume":"8 ","pages":"Article 100238"},"PeriodicalIF":0.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chemical analysis using miniaturized and Portable 3D printed systems: Where are we now? 使用小型化和便携式3D打印系统的化学分析:我们现在在哪里?
Pub Date : 2025-07-11 DOI: 10.1016/j.jcoa.2025.100241
Miryam Perrucci , Imran Ali , Fotouh R. Mansour , Halil I. Ulusoy , Songül Ulusoy , Abuzar Kabir , Ornella Abollino , Agnese Giacomino , Paolo Inaudi , Marcello Locatelli , Erika Maria Ricci
With the growing emphasis on green chemistry (GC) and green analytical chemistry (GAC), significant efforts have been directed toward minimizing sample size and simplifying sample preparation procedures. Concurrently, ongoing research has enabled the miniaturization of instrumental configurations used for quantitative analysis, aligning with the principles of sustainability.
One major challenge lies in the inherent complexity of liquid chromatography systems, which comprise multiple interconnected components. Each component has been subject to miniaturization, with careful attention to preserving analytical sensitivity, selectivity, and accuracy when applied to real samples. Interest in miniaturized systems is further fueled by the theoretical principle that reducing flow rates enhances the surface-to-volume ratio, thereby improving detection sensitivity.
Building on this theoretical foundation—particularly the goals of portability, efficient sampling, and on site analysis—innovative approaches such as microfluidics and 3D printing have been employed to develop compact fluidic systems. These technologies not only broaden the scope of liquid chromatography but also open new frontiers, such as drug testing on engineered tissues, and the development of new devices suitable for space missions.
This review aims to present a comprehensive overview of the challenges encountered and the advancements achieved in the miniaturization of instrumental setups and portable systems, encompassing both pre- and post-analytical stages. Furthermore, a discussion on 3D technologies available for LC-chip and miniaturized systems was also presented.
随着对绿色化学(GC)和绿色分析化学(GAC)的日益重视,人们已经在减少样品大小和简化样品制备过程方面做出了重大努力。同时,正在进行的研究使用于定量分析的仪器配置小型化,符合可持续性原则。一个主要的挑战在于液相色谱系统固有的复杂性,它包括多个相互连接的组件。每个组分都经过小型化处理,在应用于实际样品时,要注意保持分析灵敏度、选择性和准确性。减小流量可以提高表面体积比,从而提高检测灵敏度,这一理论原理进一步推动了人们对小型化系统的兴趣。建立在这个理论基础上,特别是便携性,高效采样和现场分析的目标,创新的方法,如微流体和3D打印已被用于开发紧凑的流体系统。这些技术不仅拓宽了液相色谱的范围,而且开辟了新的领域,如工程组织的药物测试,以及适合太空任务的新设备的开发。本综述旨在全面概述在仪器装置和便携式系统小型化方面所遇到的挑战和取得的进展,包括分析前和分析后阶段。此外,还讨论了可用于lc芯片和小型化系统的三维技术。
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引用次数: 0
Advances in miniaturized liquid sample preparation techniques for environmental analysis: A special look towards green solvents and automation 用于环境分析的小型液体样品制备技术的进展:绿色溶剂和自动化的特别展望
Pub Date : 2025-07-08 DOI: 10.1016/j.jcoa.2025.100240
Rafael Oliveira Martins, Camila Will, Maria Flávia Assunção Magalhães, Fernando Mauro Lanças
The continuous advancements in agricultural and industrial practices have led to the widespread introduction of various chemicals across key production sectors. While these substances offer significant benefits, their improper disposal has led to their accumulation in environmental compartments, raising global concerns about their potential impacts on ecosystems and human health. In quantitative and qualitative analysis, liquid miniaturized techniques have been widely applied to these matrices to ensure the detection and quantification of these compounds in environmental samples. Many of their advantages are rooted in key principles of green analytical chemistry, such as reduced sample and solvent consumption, as well as their versatility in enabling diverse extraction designs. However, the use of conventional organic solvents and labor-intensive extraction procedures still limits the full potential of these techniques in environmental applications. Hence, the present review provides an overview of current applications of miniaturized liquid-phase extraction protocols in environmental analysis, highlighting innovative approaches. Moreover, we discuss the use of green solvents and the potential for automation in these methods. Through this review, we aim to encourage researchers to adopt miniaturized liquid techniques for environmental monitoring, thereby advancing the implementation of more sustainable and efficient analytical strategies.
农业和工业实践的不断进步导致在关键生产部门广泛采用各种化学品。虽然这些物质具有显著的益处,但处置不当导致其在环境隔间中积累,引起全球对其对生态系统和人类健康的潜在影响的关注。在定量和定性分析中,液体小型化技术已被广泛应用于这些基质,以确保环境样品中这些化合物的检测和定量。它们的许多优点都植根于绿色分析化学的关键原则,例如减少样品和溶剂消耗,以及它们在实现不同提取设计方面的多功能性。然而,传统有机溶剂的使用和劳动密集型的提取程序仍然限制了这些技术在环境应用中的全部潜力。因此,本综述综述了目前小型化液相萃取技术在环境分析中的应用,重点介绍了创新方法。此外,我们讨论了绿色溶剂的使用和这些方法自动化的潜力。通过这一综述,我们旨在鼓励研究人员采用小型化液体技术进行环境监测,从而促进更可持续和高效的分析策略的实施。
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引用次数: 0
Metabolite patterns of the carbonic anhydrase inhibitors brinzolamide and dorzolamide: potential markers for the route of application 碳酸酐酶抑制剂brinzolamide和dorzolamide的代谢物模式:应用路线的潜在标记
Pub Date : 2025-07-02 DOI: 10.1016/j.jcoa.2025.100236
Y Jin , A Thomas , S Gochard , P Delahaut , M Thevis
Brinzolamide (BA) and dorzolamide (DA) are carbonic anhydrase inhibitors (CAIs), and are commonly used therapeutics for glaucoma treatment via topical application. According to the regulations of the World Anti-Doping Agency (WADA), both drugs are classified under "Diuretics and Masking Agents", prohibiting their use in- and out-of-competition, except for ophthalmic application. Despite ophthalmic use being permitted, systemic absorption occurs, enabling BA and DA detection in blood and urine samples after topical administration. Thus, distinguishing between legitimate (e.g. topical) and prohibited (e.g. oral) drug application routes is critical for sports drug testing result management.
This study investigated the elimination and metabolic profiles of BA and DA following topical and systemic administration in male piglets. Three piglets received BA or DA ophthalmic suspensions, while another three received an oral dose. Urine and blood samples were collected over one week, and all samples were analysed using liquid chromatography-high-resolution tandem mass spectrometry (LCHRMS MS). In vitro experiments yielded five phase I metabolites for DA and BA. After method validation, the approach was confirmed to detect DA and BA, with Limits of Detection (LODs) of 55 pg/mL and 75 pg/mL in urine, 110 pg/mL and 180 pg/mL in red blood cells, and 380 pg/mL and 910 pg/mL in plasma. BA and DA metabolites were primarily found in the red blood cell fraction, with only trace amounts detectable in plasma. N-desethylation was observed as the main metabolic reaction for both drugs, and metabolite-to-parent drug ratios were determined in all collected post-administration samples alongside drug concentration levels. The combined consideration of analyte ratios and drug concentrations appears to be indicative of time and dose of drug use (under the chosen routes of administration), which might assist in sports drug testing result management.
Brinzolamide (BA)和dorzolamide (DA)是碳酸酐酶抑制剂(CAIs),通常用于青光眼治疗。根据世界反兴奋剂机构(WADA)的规定,这两种药物都被归类为“利尿剂和掩蔽剂”,除了眼科应用外,它们在比赛中和比赛外都禁止使用。尽管允许眼科使用,但会发生全身吸收,使局部给药后血液和尿液样本中检测到BA和DA。因此,区分合法(如外用)和禁止(如口服)药物应用途径对运动药物检测结果管理至关重要。本研究研究了雄性仔猪局部和全身给药后BA和DA的消除和代谢情况。3头仔猪接受BA或DA眼用混悬液,另外3头仔猪接受口服剂量。在一周内收集尿液和血液样本,并使用液相色谱-高分辨率串联质谱(LCHRMS MS)分析所有样本。体外实验获得了5种DA和BA的I期代谢物。经方法验证,证实该方法可检测DA和BA,尿液的检出限(lod)分别为55 pg/mL和75 pg/mL,红细胞的检出限分别为110 pg/mL和180 pg/mL,血浆的检出限分别为380 pg/mL和910 pg/mL。BA和DA的代谢物主要存在于红细胞中,仅在血浆中检测到微量。观察到n -去甲基化是两种药物的主要代谢反应,并在所有收集的给药后样品中测定代谢物与母体药物的比率以及药物浓度水平。分析物比率和药物浓度的综合考虑似乎表明了药物使用的时间和剂量(在选择的给药途径下),这可能有助于运动药物检测结果的管理。
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引用次数: 0
Cutaneous volatile and semi-volatile organic compounds as markers of malaria-infection by wearable samplers and two-dimensional gas chromatography—time-of-flight-mass spectrometry 可穿戴取样器和二维气相色谱-飞行时间质谱法测定皮肤挥发性和半挥发性有机化合物作为疟疾感染的标志物
Pub Date : 2025-06-12 DOI: 10.1016/j.jcoa.2025.100233
Daniel T. Pretorius , Egmont R. Rohwer , Yvette Naudé
Malaria has been found to alter normal cutaneous volatile organic compound (VOC) profiles, suggesting their potential application as markers of Plasmodium infection. The cutaneous VOCs and semi-VOCs (SVOCs) of malaria-negative and -positive individuals, who visited two local clinics in the Vhembe district of Limpopo Province, South Africa, were extracted into wearable silicone rubber (polydimethyl siloxane [PDMS]) sampling bands adhered to the surface of the epidermis. After sampling of epidermal VOCs from participants the samplers were analysed by thermal desorption-comprehensive two-dimensional gas chromatography-time-of-flight-mass spectrometry (TD-GC × GC-TOFMS). Individual cutaneous VOCs and SVOCs profiles were constructed from these complex chromatographic profiles in order to identify potential signatures of Plasmodium infection. Fatty acid compounds associated with rancid malodour, and previously reported as mosquito attractants, were found at an overall greater abundance in chemical profiles of malaria-positive cases. A targeted analysis was performed for compounds previously reported to be associated with Plasmodium infection, viz., heptanal, (E)-2-octenal, 2-octanone, octanal, nonanal and (E)-2-decenal. The linearity (R2) range was 0.93–0.99 for a matrix matched (simulated cutaneous sampling) calibration range of 2.5–60 ng. Limits of detection (LOD) ranged from 0.4 pg (2-octanone) to 6.3 pg ((E)-2-octenal), whilst limits of quantification (LOQ) ranged from 1.4 pg to 21.1 pg. The mean percentage recoveries (n = 2) ranged from 77.8 % ((E)-2-decenal) to 118.9 % (2-octanone). The percentage relative standard deviations ( %RSDs; n = 2) ranged from < 1 % for 2-octanone, octanal and nonanal to 27.1 % for (E)-2-octenal. We found that this particular suite of compounds, previously reported as indicators of malaria, was in fact non-specific for Plasmodium infection when compared to control subjects with comorbidities. A previously unreported (in a malaria-infection context) compound, (E)-2-octen-1-ol, correlated with malaria-positive participants, but was also observed for two malaria-negative participants, which could indicate latent malaria. In chronic cases, Plasmodium vivax can occur in reservoirs outside of the bloodstream, and thus blood-based diagnostic tests can miss latent infection. A key advantage of the epidermal sampler over blood tests is that the former collects whole-body organic compounds, and is therefore not limited to blood-borne markers of infection. As such it appears to be feasible for future investigations.
疟疾已发现可改变正常皮肤挥发性有机化合物(VOC)谱,提示其作为疟原虫感染标记物的潜在应用。在南非林波波省Vhembe区两家当地诊所就诊的疟疾阴性和阳性个体的皮肤VOCs和半VOCs (SVOCs)被提取到粘附在表皮表面的可穿戴硅橡胶(聚二甲基硅氧烷[PDMS])取样带中。在对参与者表皮VOCs进行采样后,采用热解吸-综合二维气相色谱-飞行时间质谱(TD-GC × GC-TOFMS)对采样物进行分析。从这些复杂的色谱图谱中构建个体皮肤VOCs和SVOCs图谱,以确定疟原虫感染的潜在特征。与腐臭气味相关的脂肪酸化合物,以及以前报道的蚊子引诱剂,在疟疾阳性病例的化学特征中总体上含量更高。对先前报道的与疟原虫感染相关的化合物进行了针对性分析,即庚醛、(E)-2-辛醛、2-辛酮、辛醛、壬醛和(E)-2-癸醛。在基质匹配(模拟皮肤取样)2.5 ~ 60 ng的校准范围内,线性(R2)范围为0.93 ~ 0.99。检出限(LOD)为0.4 pg(2-辛酮)~ 6.3 pg ((E)-2-辛酮),定量限(LOQ)为1.4 pg ~ 21.1 pg。平均回收率(n = 2)为77.8% (E)-2-辛酮)~ 118.9%(2-辛酮)。相对标准偏差百分比(% rsd;N = 2)从<;2-辛酮、辛醛和壬醛为1%,(E)-2-辛醛为27.1%。我们发现,与有合并症的对照受试者相比,这组特定的化合物,以前被报道为疟疾的指标,实际上对疟原虫感染没有特异性。一种以前未报道的(在疟疾感染背景下)化合物(E)-2-辛烯-1-醇与疟疾阳性参与者相关,但也在两名疟疾阴性参与者中观察到,这可能表明潜伏性疟疾。在慢性病例中,间日疟原虫可发生在血液之外的宿主中,因此基于血液的诊断测试可能会遗漏潜伏感染。与血液检测相比,表皮取样器的一个关键优势是前者收集全身有机化合物,因此不局限于血液传播的感染标志物。这样看来,未来的研究是可行的。
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Journal of chromatography open
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