机构地区:[1]交通部长江航务管理局疾病预防控制中心卫生检验所,武汉430019 [2]华中科技大学同济医学院公共卫生学院环境医学研究所教育部重点实验室
出 处:《中华预防医学杂志》2013年第3期270-273,共4页Chinese Journal of Preventive Medicine
基 金:基金项目:国家自然科学基金(21177046)
摘 要:目的建立尿样中挥发性亚硝胺类化合物含量的气相色谱.质谱的检测方法,并应用于实际样本的检测。方法样品采用二氯甲烷进行液液萃取,后取二氯甲烷层进行过滤,于40℃下氮气吹干,使用0.2ml二氯甲烷定容;利用气相色谱一质谱仪的选择离子监测模式测定9种挥发性亚硝胺,采用外标法定量,并对方法检测限,精密度和准确度进行评价。同时检测了安徽某镇92份居民的尿样中9种挥发性亚硝胺的含量。结果得到9种待测物线性范围较好(2—200ng/m1),相关系数为0.9985~0.9999,最低检出浓度为0.05~0.50ng/ml。加标回收率为68%-102%,RSD为0.4%~5.5%(n=3),方法检测限为0.001—0.013ng/ml。92名受检人群N.亚硝基二甲胺(NDMA),N-亚硝基甲基乙基胺(NMEA),亚硝基-二乙基胺(NDEA),N一亚硝基二丙胺(NDPA),N一亚硝基吡咯烷(NPYR),N一亚硝基吗啉(NMOR),N一亚硝基哌啶(NPIP),N-亚硝基二丁胺(NDBA),N-亚硝基二苯胺(NDPhA)检出率依次为71%(65),74%(68),65%(60),80%(73),92%(85),78%(72),76%(70),87%(80),98%(90);测得结果分别为(0.27±0.12)、(0.75±0.29)、(0.06±0.02)、(0.16±0.07)、(23.66±5.18)、(1.01±0.35)、(0.38±0.11)、(2.47±0.52)、(15.13±3.48)nmol/g肌酐。结论建立了尿样中低含量亚硝胺的气相色谱-质谱检测方法。Objective To establish a detection method based on gas chromatography-mass spectrometry (GC-MS) for concentrations of volatile nitrosamine compounds in urine, and apply it to the test of real samples. Methods Target compounds dichloromethane in urine samples was extracted with dichloromethane through liquid-liquid extraction, then the dichloromethane extract was filtrated, evaporated with nitrogen at 40 ℃ to dryness, and the volume was set with 0. 2 ml dichloromethane. Analysis of nine volatile nitroso-compounds were performed with GC-MS under selected ion monitoring mode, external reference method was used for quantification, and the detection limit, repeatability and sensitivity were evaluated. In addition, nine volatile nitroso-compounds of 92 urine samples in a town of Anhui province were measured. Results A good linear range of 2 - 200 ng/ml ( with correlation coefficient 0. 9985 - 0. 9999) were obtained for the above mentioned nine kinds of analyte, and the lowest examination concentration was 0. 05 -0. 50 ng/ml. The addition standard recoveries were 68% - 102% with the RSD of 0. 4% - 5.5% (n = 3 ). The detection limits were O. 001 -0. 013 ng/ml urine. The detection rate of N-nitrosodimethylamine (NDMA) ,N-nitrosomethylethylamine ( NMEA), N-nitrosodiethylamine ( NDEA), N-nitrosodi-n-propylamine ( NDPA ), N-nitrosopyrrolidine ( NPYR ), N-nitrosomorpholine ( NMOR ), N-nitrosopiperidine ( NPIP ),N-nitrosodi-n-butylamine (NDBA) and N-nitrosodiphenylamine ( NDPhA ) were 71% ( 65 ), 74% ( 68 ), 65% (60) ,80% ( 73 ), 92% ( 85 ), 78% ( 72 ), 76% ( 70 ), 87% ( 80 ), 98% ( 90 ), respectively, with the results (0. 27 ±0. 12) ,(0.75 ±0.29) ,(0.06±0.02) ,(0. 16 ±0.07) ,(23.66 ±5. 18) ,(1.01 ±0.35), (0.38 ± 0.11), (2.47 ± 0.52) and (15.13 ± 3.48) nmol/g creatinine. Conclusions A gas chromatography-mass spectrometry detect method was developed for low level volatile nitrosamines in urine sampl
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