摘要： 对水源水及饮用水中二甲基异莰醇（2-MIB）、土臭素（GSM）这2种嗅味物质采用液液萃取与气相色谱-质谱联用的方法测定，对水体中的细胞破壁，检测胞内胞外嗅味物质。2-MIB、GSM经过加氯化钠盐、正己烷液液萃取、浓缩、进样，经气相色谱-质谱联用法分析测定，选择离子模式定量。结果表明，该方法分离效果好，2-MIB、GSM在10~100 μg/L的标准曲线中均线性良好，回归系数R2>0.995，取样体积1 000 mL时，检出限分别为2.58、2.45 ng/L。2-MIB、GSM加标回收率分别为86.7%~103.0%、87.5%~91.8%，2-MIB、GSM的RSD分别为3.8%~7.9%、4.1%~9.8%。
关键词:
嗅味物质,
液液萃取,
气相色谱-质谱联用法
Abstract: Two kinds of olfactory substances, i.e. dimethyl isocamphthenol(2-MIB) and GSM in water sources and drinking water have been determined by the liquid-liquid extraction combined with gas chromatography-mass spectrometry process, the cell walls in water bodies broken, and the intracellular and extracellular olfactory substances detected. 2-MIB and GSM have been subject to the addition of sodium chloride, normal hexane liquid-liquid extraction, concentration, and sample introduction, analyses and determination by gas chromatography-mass spectrometry process, and the selection of ion mode quantity. The results show that the method has good separation effect. The linearity of both 2-MIB and GSM is good in the standard curve of 10-100 μg/L. The regression coefficient R2 is more than 0.995. When the sampling volume is 1 000 mL,the detection limits are 2.58 ng/L and 2.45 ng/L,respectively. The standard recovery rate of 2-MIB and GSM are 86.7%-103.0%,and 87.5%-91.8%,respectively. The RSD of 2-MIB and GSM are 3.8%-7.9% and 4.1%-9.8%,respectively.
Key words:
olfactory substance,
liquid-liquid extraction,
gas chromatography-mass spectrometry
中图分类号:
陈罡, 蔡海江, 韩琳, 张伟. 气相色谱质谱法测定2种嗅味物质前处理方法探讨[J]. 工业水处理, 2019, 39(1): 99-102.
Chen Gang, Cai Haijiang, Han Lin, Zhang Wei. Investigation on the pretreatment method before the determination of two kinds of olfactory substances by gas chromatography-mass spectrometry method[J]. Industrial Water Treatment, 2019, 39(1): 99-102.