Quantitative detection of formaldehyde using solid phase microextraction gas chromatography-mass spectrometry coupled to cysteamine scavenging.

Quantitative detection of formaldehyde using solid phase microextraction gas chromatography-mass spectrometry coupled to cysteamine scavenging.
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DOI:
10.1038/s41598-023-41609-0
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发表时间:
2023-09-05
期刊:
影响因子:
4.6
通讯作者:
--
中科院分区:
综合性期刊3区
文献类型:
--
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甲醛(HCHO)是一种有毒致癌物,是在生理条件下与生物分子发生反应的人体代谢物。量化HCHO对正在进行的HCHO生物学和生物医学研究至关重要;然而,它的反应性、小尺寸和波动性使其具有挑战性。在这里,我们报告了一种新的HCHO检测/定量方法,将半胱氨酸介导的HCHO清除与SPME GC-MS分析结合起来。我们的核磁共振研究证实,半胱胺是一种高效和选择性的HCHO清除剂,与最常用的清除剂O-(2,3,4,5,6-五氟苯基)羟胺竞争,形成一种稳定的噻唑烷,可用于GC-MS定量。根据FDA和EMA指南验证了我们的GC-MS方法,分别显示了在纳摩尔和微摩尔范围内的检测和定量限制,而细菌细胞裂解液的分析证实了其在生物样品中的适用性。总之,我们的研究证实,半胱胺清除与SPME相结合的GC-MS分析提供了一种灵敏且化学可靠的方法来定量生物样品中的HCHO。
Formaldehyde (HCHO) is a toxic and carcinogenic pollutant and human metabolite that reacts with biomolecules under physiological conditions. Quantifying HCHO is essential for ongoing biological and biomedical research on HCHO; however, its reactivity, small size and volatility make this challenging. Here, we report a novel HCHO detection/quantification method that couples cysteamine-mediated HCHO scavenging with SPME GC–MS analysis. Our NMR studies confirm cysteamine as an efficient and selective HCHO scavenger that out-competes O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine, the most commonly used scavenger, and forms a stable thiazolidine amenable to GC–MS quantification. Validation of our GC–MS method using FDA and EMA guidelines revealed detection and quantification limits in the nanomolar and micromolar ranges respectively, while analysis of bacterial cell lysate confirmed its applicability in biological samples. Overall, our studies confirm that cysteamine scavenging coupled to SPME GC–MS analysis provides a sensitive and chemically robust method to quantify HCHO in biological samples.
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影响因子: 5.9
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DOI: 10.1016/0378-4347(93)e0436-t
发表时间: 1994-03-18
期刊: JOURNAL OF CHROMATOGRAPHY B-BIOMEDICAL APPLICATIONS
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作者:
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