气相色谱-附加氯的化学电离与低分辨质谱法联用测定短链氯化石蜡含量

Determination of Short Chain Chlorinated Paraffins by GC-Chloridine Attchment Chemical Ionization in Hyphenation with Low Resolution MS

以己烷-二氯甲烷混合溶剂上气体经石英毛细管柱直接导入离子源为反应气,建立了气相色谱-附加氯的化学电离-低分辨质谱法检测短链氯化石蜡。加标回收率在84.9%~95.4%之间,测定值的相对标准偏差在15%~18%之间。本法应用于实际样品测试,并和碳骨架法进行了对比。结果表明：对于中链（MCCP）与短链的氯化石蜡（SCCP）质量比（mMCCP/mSCCP）比值较低样品,相对误差在3.67%~7.69%之间;对于mMCCP/mSCCP比值较高样品,相对误差为77.9%。

GC with chloridion attachment chemical ionization in hyphenation with low resolution MS was applied to the determination of short chain chlorinated paraffins（SCCP）.Vapour over a mixed solvent of n-hexane and dichloromethane,which was used as the reagent gas,was introduced directly into the ion-source through a capillary chromatographic column.Values of recovery found by standard addition method were in the range of84.9%-95.4%,and RSD′s in the range of 15%-18%.The proposed method was applied to the analysis of some substantial samples.As compared with the carbon skeleton method,values of relative errors found were ranged from 3.67%to 7.69%for samples with low mMCCP/mSCCPratios,and was 77.9%for samples with high mMCCP/mSCCP ratios.