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《化学分析计量》 2020年第06期
DOI:10.3969/j.issn.1008-6145.2020.06.012
气相色谱-质谱法同时测定海水中甲基汞、乙基汞和三丁基锡
黄键,张文国,施锦辉,曹海峰,王红卫,葛红梅,王金娟
南通海关综合技术中心,江苏南通 226004 
Simultaneous determination of methyl mercury, ethyl mercury and tributyltin in seawater by gas chromatography-mass spectrometry
HUANG Jian, ZHANG Wenguo, SHI Jinhui, CAO Haifeng, WANG Hongwei, GE Hongmei, WANG Jinjuan
Nantong Customs Comprehensive Technology Center, Nantong 226004, China 
摘要:建立气相色谱-质谱法同时测定海水中甲基汞、乙基汞和三丁基锡的分析方法。海水样品用乙酸调节pH后,用四苯基硼酸钠进行衍生,经HP-5MS毛细柱分离,选择离子监控(SIM)模式检测,以外标法定量。甲基汞、乙基汞和三丁基锡的质量浓度在0.1~2 mg/L范围内与色谱峰面积呈良好的线性关系,相关系数均大于0.998,检出限分别为0.015,0.015,0.010 mg/L,样品平均加标回收率为78.1%~90.2%,相对标准偏差为2.3%~4.5%(n=6)。该方法前处理简单,可用于海水中有机汞和有机锡的同时测定。  
Abstract:A method for the simultaneous determination of methyl mercury, ethyl mercury and tributyltin in seawater by gas chromatography-mass spectrometry(GC-MS) was established. The pH of seawater samples was adjusted by acetic acid. The samples were derived by sodium tetrapenylborate and then separated by HP-5MS(30 m×0.25 mm, 0.25 μm)column, finally determined by GC-MS with selected ion monitoring and quantified with external standard method. The mass concentrations of methyl mercury, ethyl mercury and tributyltin had a good linear relationship with the chromatographic peak area in the range of 0.1-2 mg/L, the correlation coefficients were all more than 0.998, and the detection limits were 0.015, 0.015 and 0.010 mg/L, respectively. The average recoveries were 78.1%-90.2%, and the relative standard deviations were 2.3%-4.5%(n=6). The method is simple in pretreatment, which can be used for simultaneous determination of organomercury and organotin in seawater.  
关键词:气相色谱-质谱法;有机汞;有机锡 
Keywords:gas chromatography-mass spectrometry; organomercury; organotin 
本文引用格式:
黄键,张文国,施锦辉,等.气相色谱-质谱法同时测定海水中甲基汞、乙基汞和三丁基锡[J].化学分析计量,2020,29(6):51-54.
HUANG J,ZHANG W G,SHI J H,et al. Simultaneous determination of methyl mercury,ethyl mercury and tributyltin in seawater by gas chromatography-mass spectrometry[J]. Chemical analysis and meterage,2020,29(6):51-54. 

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