Development of biochromic paper strips from cellulose nanocrystals and anthocyanin extract from pomegranate (Punica granatum L.) for colorimetric determination of urea

IF 2.7 3区 化学 Q2 POLYMER SCIENCE Journal of Applied Polymer Science Pub Date : 2024-09-18 DOI:10.1002/app.56284
Salhah D. Al-Qahtani, Yasser A. Attia, Ghadah M. Al-Senani
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Abstract

An anthocyanin (ACN) spectroscopic probe was extracted and immobilized into a matrix of cellulose nanocrystals (CNC)/urease enzyme to create a colorimetric nanocomposite film sensor. The ACN@CNC composite is a disposable molecular biosensor that uses urease as a catalyst, ACN as a molecular probe, and CNC as a probe carrier with a high surface area. The ACN spectroscopic probe was isolated from the pomegranate peel (Punica granatum L.). A mordant was applied to fix ACN onto CNC by forming nanoparticles (6–14 nm) of mordant/ACN (M/ACN) complexation. CNC showed diameters in the range of 11–21 nm, and crystal lengths of 55–130 nm. Under acid/base conditions, the ACN probe solution in distilled water exhibited a reversible color change, as shown by the UV–Vis absorption spectra. In order to create a biocomposite film, CNC were reinforced with a sodium alginate biopolymer. Upon exposure to urea in an aqueous solution, the ACN@CNC film biosensor changes color from purple (598 nm) to white (432 nm). The detection limit of urea was determined at 25–450 ppm. Various methods were utilized to investigate the morphological properties of CNC and ACN@CNC films.

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利用纤维素纳米晶体和石榴(Punica granatum L.)花青素提取物开发用于比色测定尿素的生物色谱纸条
提取花青素(ACN)光谱探针并将其固定到纤维素纳米晶体(CNC)/脲酶基质中,从而创建了一种比色纳米复合薄膜传感器。ACN@CNC 复合材料是一种一次性分子生物传感器,它以脲酶为催化剂,以 ACN 为分子探针,以具有高比表面积的 CNC 为探针载体。ACN 光谱探针是从石榴皮(Punica granatum L.)中分离出来的。应用媒染剂将 ACN 固定在 CNC 上,形成媒染剂/ACN(M/ACN)复合物纳米颗粒(6-14 nm)。CNC 的直径范围为 11-21 nm,晶体长度为 55-130 nm。在酸碱条件下,蒸馏水中的 ACN 探针溶液呈现出可逆的颜色变化,紫外可见吸收光谱显示了这一点。为了制作生物复合薄膜,用海藻酸钠生物聚合物增强了 CNC。接触水溶液中的尿素后,ACN@CNC 薄膜生物传感器的颜色会从紫色(598 纳米)变为白色(432 纳米)。尿素的检测限为 25-450 ppm。利用各种方法研究了 CNC 和 ACN@CNC 薄膜的形态特性。
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来源期刊
Journal of Applied Polymer Science
Journal of Applied Polymer Science 化学-高分子科学
CiteScore
5.70
自引率
10.00%
发文量
1280
审稿时长
2.7 months
期刊介绍: The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.
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