کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1206082 1493707 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Direct determination of volatile analytes from solid samples by UV-ion mobility spectrometry
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Direct determination of volatile analytes from solid samples by UV-ion mobility spectrometry
چکیده انگلیسی

A simple, reliable, inexpensive sample introduction system (SIS) coupled to an ion mobility spectrometry (IMS) equipment was used for the determination of volatile analytes present in solid samples. Following minimal pretreatment, the solid sample (e.g. fish) is directly placed in a membrane unit and released analytes (trimethylamine, dimethylamine and ammonia) pass through the membrane into a nitrogen acceptor stream; finally, passing the gaseous stream trough the UV-IMS system allows the analytes to be readily determined. Volatiles are released by heating the sample at 75 °C for 5 min following addition of a few drops of NaOH solution. This method is quite expeditious and uses small amounts of sample. The calibration graph is linear over the concentration range 5–225 μg mL−1. The proposed SIS–IMS method is quite repeatable (RSD < 4%) and reproducible (RSD < 9%). Also, it provides acceptable analyte recoveries (111 ± 17%) from spiked fish samples. The results of this study testify to the potential of IMS for qualitative and quantitative analytical determinations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1215, Issues 1–2, 26 December 2008, Pages 8–14
نویسندگان
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