Determination of NDMA in Aqueous samples by using dispersive Micro Solid Phase Extraction coupled with gas chromatography/mass spectrometry

碩士 === 國立中央大學 === 化學研究所 === 99 === Abstract Disinfection has successfully applied to eliminate pathogens in various water supplies, however its byproducts (DBPs) cause unintended health risks to human. N-nitrosodimethylamine (NDMA) is one of the most toxic DBPs that raises the cancer risk. Due to it...

Full description

Bibliographic Details
Main Authors: Ssu-chieh Fu, 傅思潔
Format: Others
Language:zh-TW
Published: 2011
Online Access:http://ndltd.ncl.edu.tw/handle/28012794863993225796
id ndltd-TW-099NCU05065097
record_format oai_dc
spelling ndltd-TW-099NCU050650972017-07-07T04:31:06Z http://ndltd.ncl.edu.tw/handle/28012794863993225796 Determination of NDMA in Aqueous samples by using dispersive Micro Solid Phase Extraction coupled with gas chromatography/mass spectrometry 以分散微固相萃取法搭配氣相層析質譜儀快速檢測水樣中之NDMA Ssu-chieh Fu 傅思潔 碩士 國立中央大學 化學研究所 99 Abstract Disinfection has successfully applied to eliminate pathogens in various water supplies, however its byproducts (DBPs) cause unintended health risks to human. N-nitrosodimethylamine (NDMA) is one of the most toxic DBPs that raises the cancer risk. Due to its high toxicity, nowadays, the presence of NDMA and other N-nitrosamines in water is an emerging issue since many of them are suspected to be human carcinogens. They are also listed in the Unregulated Contaminant Monitoring Rule 2 (UCMR-2) by US-EPA. In this study, a simple sample pretreatment technique, dispersive micro-solid phase extraction (dMSPE), was developed for the extraction of NDMA and other N-nitrosamines (NAs) from aqueous samples. The parameters affecting the extraction efficiency were systematically investigated and the conditions optimized. The best extraction conditions involved the immersed 75 mg of carbon molecular sieve, carboxen 1003 (as adsorbent), in a 50 mL water sample containing 5% of sodium chloride in a sample tube. After 20 min of shaking extraction, the adsorbent was collected under rapidly filtered, and 150 ?L of dichloromethane was used to elute NAs from the adsorbent. The extract 10 ?L was then directly determined by large-volume injection gas chromatography with chemical ionization mass spectrometry (GC-CI/MS) under selected ion storage mode. The limits of quantitation (LOQs) were less than 0.9 ng/L. The method was validated through a recovery study of various environmental III samples. Concentrations of NDMA in swimming pool water samples were detected ranging 4.7 to 127.4 ng/L, and recovery ranged from 57-113% and the relative standard deviation was below 20%. This developed method is a simple and solvent-less pretreatment method to detect NDMA and other N-nitrosamines in aqueous sample. Ssu-chieh Fu Wang-Hsien Ding 傅思潔 丁望賢 2011 學位論文 ; thesis 119 zh-TW
collection NDLTD
language zh-TW
format Others
sources NDLTD
description 碩士 === 國立中央大學 === 化學研究所 === 99 === Abstract Disinfection has successfully applied to eliminate pathogens in various water supplies, however its byproducts (DBPs) cause unintended health risks to human. N-nitrosodimethylamine (NDMA) is one of the most toxic DBPs that raises the cancer risk. Due to its high toxicity, nowadays, the presence of NDMA and other N-nitrosamines in water is an emerging issue since many of them are suspected to be human carcinogens. They are also listed in the Unregulated Contaminant Monitoring Rule 2 (UCMR-2) by US-EPA. In this study, a simple sample pretreatment technique, dispersive micro-solid phase extraction (dMSPE), was developed for the extraction of NDMA and other N-nitrosamines (NAs) from aqueous samples. The parameters affecting the extraction efficiency were systematically investigated and the conditions optimized. The best extraction conditions involved the immersed 75 mg of carbon molecular sieve, carboxen 1003 (as adsorbent), in a 50 mL water sample containing 5% of sodium chloride in a sample tube. After 20 min of shaking extraction, the adsorbent was collected under rapidly filtered, and 150 ?L of dichloromethane was used to elute NAs from the adsorbent. The extract 10 ?L was then directly determined by large-volume injection gas chromatography with chemical ionization mass spectrometry (GC-CI/MS) under selected ion storage mode. The limits of quantitation (LOQs) were less than 0.9 ng/L. The method was validated through a recovery study of various environmental III samples. Concentrations of NDMA in swimming pool water samples were detected ranging 4.7 to 127.4 ng/L, and recovery ranged from 57-113% and the relative standard deviation was below 20%. This developed method is a simple and solvent-less pretreatment method to detect NDMA and other N-nitrosamines in aqueous sample.
author2 Ssu-chieh Fu
author_facet Ssu-chieh Fu
Ssu-chieh Fu
傅思潔
author Ssu-chieh Fu
傅思潔
spellingShingle Ssu-chieh Fu
傅思潔
Determination of NDMA in Aqueous samples by using dispersive Micro Solid Phase Extraction coupled with gas chromatography/mass spectrometry
author_sort Ssu-chieh Fu
title Determination of NDMA in Aqueous samples by using dispersive Micro Solid Phase Extraction coupled with gas chromatography/mass spectrometry
title_short Determination of NDMA in Aqueous samples by using dispersive Micro Solid Phase Extraction coupled with gas chromatography/mass spectrometry
title_full Determination of NDMA in Aqueous samples by using dispersive Micro Solid Phase Extraction coupled with gas chromatography/mass spectrometry
title_fullStr Determination of NDMA in Aqueous samples by using dispersive Micro Solid Phase Extraction coupled with gas chromatography/mass spectrometry
title_full_unstemmed Determination of NDMA in Aqueous samples by using dispersive Micro Solid Phase Extraction coupled with gas chromatography/mass spectrometry
title_sort determination of ndma in aqueous samples by using dispersive micro solid phase extraction coupled with gas chromatography/mass spectrometry
publishDate 2011
url http://ndltd.ncl.edu.tw/handle/28012794863993225796
work_keys_str_mv AT ssuchiehfu determinationofndmainaqueoussamplesbyusingdispersivemicrosolidphaseextractioncoupledwithgaschromatographymassspectrometry
AT fùsījié determinationofndmainaqueoussamplesbyusingdispersivemicrosolidphaseextractioncoupledwithgaschromatographymassspectrometry
AT ssuchiehfu yǐfēnsànwēigùxiāngcuìqǔfǎdāpèiqìxiāngcéngxīzhìpǔyíkuàisùjiǎncèshuǐyàngzhōngzhīndma
AT fùsījié yǐfēnsànwēigùxiāngcuìqǔfǎdāpèiqìxiāngcéngxīzhìpǔyíkuàisùjiǎncèshuǐyàngzhōngzhīndma
_version_ 1718492132138811392