CAJ | 학술논문

通过改进气相色谱气化室,实现了离子液体分散液液微萃取与气相色谱的联用。以水不互溶的离子液体1-丁基-3-甲基咪唑六氟磷酸盐作为萃取剂,丙酮作为分散剂,能够从水溶液中有效地萃取苯系物。利用改进装置优化了苯、甲苯、乙苯的分散液液萃取及气相色谱分析条件,得到富集倍数为31～105,检出限为0.2～0.5μg/L.离子液体作为萃取剂在气相色谱进样后不产生溶剂干扰峰,且可回收重复利用。
통과개진기상색보기화실,실현료리자액체분산액액미췌취여기상색보적련용。이수불호용적리자액체1-정기-3-갑기미서륙불린산염작위췌취제,병동작위분산제,능구종수용액중유효지췌취분계물。이용개진장치우화료분、갑분、을분적분산액액췌취급기상색보분석조건,득도부집배수위31～105,검출한위0.2～0.5μg/L.리자액체작위췌취제재기상색보진양후불산생용제간우봉,차가회수중복이용。
The advantages of dipersive liquid-liquid microextraction（DLLME） coupled to gas chromatography are simplicity of operation,rapidity,low cost with high recovery rate and enrichment factor.Ionic liquids based DLLME coupled to gas chromatography for the simultaneous determination of diversified aromatic hydrocarbons was developed in this paper.The sample injection part of gas chromatographic instrument was modified to avoid the ionic liquid leaking into the chromatographic column.The parameters affecting extraction efficiency such as extractant,dispersive solvent,volume of the solvent and extraction time were studied.Under the optimum conditions,the enrichment factors ranged from 31 to 105.The linear range for the determination was 1-100 μg/L and the limits of detection were from 0.2 to 0.5 μg/L（S /N = 3）,with the correlation coefficients（r） varying from 0.991 to 0.995.Using ionic liquid as extractantcan can effectively reduce the interference of solvent peak and enhance the extraction efficiency as well.