摘要
本研究建立了负化学源-气相色谱质谱法(NCI-GC-MS)联用技术定量分析塑料儿童玩具中的短链氯化石蜡(C_(10)—C_(13))的分析方法。样品经正己烷超声提取,浓硫酸净化后,采用负化学源-气相色谱质谱仪测定,以外标法定量,得到了较宽的线性范围和较低的定量检出限。短链氯化石蜡(C_(10)—C_(13))的系列浓度为:3.125—50 mg·L^(−1),相关系数(r)在0.997以上。方法检出限为0.036 g·kg^(−1),方法定量限为0.12 g·kg^(−1),加标回收率在95.9%—115.2%之间,相对标准偏差范围在2.8%—6.3%。该方法操作简单、灵敏度高、准确可靠,可用于塑料儿童玩具中短链氯化石(C_(10)—C_(13))含量测定。
A method was established for determination on short chain chlorinated paraffin(C_(10)—C_(13))in plastic children's toys by negative chemical-gas chromatography-mass spectrometry(NCI-GC-MS).The samples were extracted with n-hexane,and the extracted solution was purified with 98%sulfuric acid and analyzed by NCI-GC-MS.A relatively wide linear range and a low limit of detection were obtained.The calibration curve of short chain chlorinated paraffin(C_(10)—C_(13))ranged from 3.125 mg·L^(−1) to 50 mg·L^(−1),and the correlation coefficient was over 0.997.The detection limit of the method was 0.036 g·kg^(−1),the quantitative limit of the method was 0.12 g·kg^(−1),the recoveries were 95.9%—115.2%,and the relative standard deviations were 2.8%—6.3%.The method is simple,sensitive,accurate and reliable,and can be used for the determination of short chain chlorinated paraffin(C_(10)—C_(13))in plastic children’s toys.
作者
王妍力
尹戈
林黛琴
聂绍丽
WANG Yanli;YIN Ge;LIN Daiqin;NIE Shaoli(Jiangxi Institute of Supervision&Inspection on Product Quality,Nanchang,330029,China;Shimadzu China Co.,Ltd,Shanghai,200233,China)
出处
《环境化学》
CAS
CSCD
北大核心
2021年第8期2586-2588,共3页
Environmental Chemistry
关键词
负化学源-气相色谱质谱法(NCI-GC-MS)
短链氯化石蜡
塑料儿童玩具
negative chemical ionization-gas chromatography-mass spectrometry(NCI-GC-MS)
short chain chlorinated paraffin
plastic children’s toys
