干旱区生态环境知识资源中心(Arid): 气相色谱-负化学源质谱法对水中2-甲-4-氯和2,4-滴的测定

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	气相色谱-负化学源质谱法对水中2-甲-4-氯和2,4-滴的测定
其他题名	Determination of MCPA and 24-D in Water by Gas Chromatography-Negative Chemical Ionization Mass Spectrometry
	匡科 1; 赵建亮 1; 应光国 1; 袁永钦 2; 杨小兵 1; 李忠军 3
ISSN	1004-4957
出版年	2008
卷号	27 期号:8 页码:816-819,824
中文摘要	建立了气相色谱-负化学源质谱法(GC-NCI MS)测定水中2-甲-4-氯(MCPA)和2,4-滴(2,4-D)2种酸性除草剂的分析方法。水样经过Oasis HLB柱萃取后,进行五氟苄基溴(PFBBr)衍生化,用2,4-二氯苯乙酸(2,4-DCPA)作内标进行定量分析,并以2-甲-4-氯丙酸(mecoprop)作回收率指示物对整个分析过程进行监控,以保证分析结果的准确性。mecoprop、MCPA和2,4-D在5、100、200 ng/L 3个不同添加水平下的回收率在82%~135%范围内,RSD在1.3%~9.3%范围内,在1~200mug/L线性范围内,相关系数r大于0.997,MCPA、2,4-D的方法检出限分别为0.60、0.45 ng/L。2007年11月采用GC-NCI MS方法对南方地区某河流中的MCPA和2,4-D含量进行调查,其质量浓度分别不大于19.4 ng/L和6.2 ng/L,监测结果表明,该河流水质没有受到MCPA和2,4-D酸性除草剂的污染。
英文摘要	An analytical method for the determination of MCPA((4-chloro-2-methylphenoxy)-acetic acid) and 24-D((24-dichlorophenoxy)-acetic acid) in water was developed based on gas chromatography with negative chemical ionization mass spectrometry(GC-NCI MS).The water sample,after being extracted with Oasis HLB and derivatized with PFBBr,was determined with 24-DCPA((24-dichlorophenyl)-acetic acid) as internal standard.The accuracy of the measurements of analytes was ensured with recovery correction strategy employing mecoprop(2-(4-chloro-2-methylphenoxy) propanoic acid) as surrogate.The recovery studies were performed at 5,100 and 200 ng/L fortification levels for mecoprop,MCPA and 24-D,respectively,and the recoveries ranged from 82% to 135% with a relative standard deviation between 1.3% and 9.3%.The developed method was linear over the range of 1-200 mug/L with correlation coefficients more than 0.997.The detection limit of the method for MCPA and 24-D was 0.60 and 0.45 ng/L,respectively.The method was applied in the determination of MCPA and 24-D in water samples from some river of south of China in November 2007 with the concentrations less than 19.4 and 6.2 ng/L,respectively.The results showed that the pollution state of MCPA and 24-D in the area was not serious.
中文关键词	气相色谱-负化学源质谱法 ; 2-甲-4-氯 ; 2,4-滴 ; 五氟苄基溴a2,4-二氯苯乙酸 ; 2-甲-4-氯丙酸
英文关键词	GC-NCI MS MCPA 2,4-D PFBBr 2,4-DCPA mecoprop
语种	中文
国家	中国
收录类别	CSCD
WOS类目	CHEMISTRY ANALYTICAL
WOS研究方向	Chemistry
CSCD记录号	CSCD:3331583
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222208
作者单位	1.中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广州, 广东 510640, 中国; 2.广州市自来水分司, 广州, 广东 510160, 中国; 3.中国广州分析测试中心, 广州, 广东 510070, 中国
推荐引用方式 GB/T 7714	匡科,赵建亮,应光国,等. 气相色谱-负化学源质谱法对水中2-甲-4-氯和2,4-滴的测定[J],2008,27(8):816-819,824.
APA	匡科,赵建亮,应光国,袁永钦,杨小兵,&李忠军.(2008).气相色谱-负化学源质谱法对水中2-甲-4-氯和2,4-滴的测定.,27(8),816-819,824.
MLA	匡科,et al."气相色谱-负化学源质谱法对水中2-甲-4-氯和2,4-滴的测定".27.8(2008):816-819,824.