分析氮基质中二氧化碳标准混合气体的气相色谱法验证和稳定性研究

IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION MAPAN Pub Date : 2024-06-06 DOI:10.1007/s12647-024-00757-y
Harry Budiman, Dhan Rasyidan, Arum Ma’rifatun Khikmah
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摘要

目前,要获得有效可靠的监测数据,必须对二氧化碳排放量进行精确和准确的测量,作为环境决策者决策的依据。本研究利用气相色谱-热导检测器(GC-TCD)对排放浓度为 1000 μmol/mol 和 2.8% mol/mol 的二氧化碳进行了方法验证。对方法验证的各种参数,如选择性、检出限(LoD)、定量限(LoQ)、准确度、精密度、线性度和坚固性进行了深入研究。结果表明,GC-TCD 方法具有良好的重复性和中等精度,相对标准偏差小于 0.2%,而偏差方法的值在± 2σ (σ:实验室结果的精度)之间。对于 2.8% mol/mol 和 1000 µmol/mol 的二氧化碳测量值,相对扩大的不确定度估计值分别约为 0.5% 和 0.8%。经过验证的 GC-TCD 内部方法精确、准确,适用于测量 N2 基质中的二氧化碳气体,能够量化二氧化碳排放水平(1000 µmol/mol 和 2.8% mol/mol)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Method Validation of Gas Chromatography and Stability Study for Analysis of Standard Gas Mixtures of Carbon Dioxide in Nitrogen Matrix

Currently, precise and accurate measurements of CO2 emissions are essential for obtaining valid and reliable monitoring data, which serve as the basis for decision-making by environmental policy makers. In this study, method validation was carried out to measure CO2 at emission concentrations (1000 μmol/mol and 2.8% mol/mol) using gas chromatography with a thermal conductivity detector (GC-TCD). Various parameters of method validation, such as selectivity, limit of detection (LoD), limit of quantification (LoQ), accuracy, precision, linearity, and ruggedness, were investigated thoroughly. The results showed that the GC-TCD method demonstrated good repeatability and intermediate precision, with a % relative standard deviation less than 0.2%, while the bias method had a value between ± 2σ (σ: precision of laboratory result). The relative expanded uncertainty estimations are approximately 0.5% and 0.8% for CO2 measurements of 2.8% mol/mol and 1000 µmol/mol, respectively. The validated in-house method of GC-TCD is found to be precise, accurate, and fit for the purpose of measuring CO2 gases in the N2 matrix and capable of quantifying CO2 emission levels (1000 µmol/mol and 2.8% mol/mol).

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来源期刊
MAPAN
MAPAN 工程技术-物理:应用
CiteScore
2.30
自引率
20.00%
发文量
91
审稿时长
3 months
期刊介绍: MAPAN-Journal Metrology Society of India is a quarterly publication. It is exclusively devoted to Metrology (Scientific, Industrial or Legal). It has been fulfilling an important need of Metrologists and particularly of quality practitioners by publishing exclusive articles on scientific, industrial and legal metrology. The journal publishes research communication or technical articles of current interest in measurement science; original work, tutorial or survey papers in any metrology related area; reviews and analytical studies in metrology; case studies on reliability, uncertainty in measurements; and reports and results of intercomparison and proficiency testing.
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