CAJ | 학술논문

采用蒸气顶空富集-自动顶空气相色谱法，研究了海水中痕量苯系物（包括苯、甲苯、乙苯、对二甲苯、间二甲苯、邻二甲苯和苯乙烯）的测定方法，优化了蒸气富集作为海水中苯系物预处理方法的参数。对其精馏管长度、回收冷凝液体积、吸收介质等影响富集效果的关键因素进行了评价，并优化了色谱条件，考察方法的精密度和回收率。结果表明，大体积水样经过10 cm 长度冷凝管的二次冷凝富集，以水作为吸收剂，1 L 水样富集浓缩至10 mL 后，可使原有自动顶空气相色谱分析苯系物的灵敏度提高1~2个数量级。采用蒸气顶空富集-顶空气相色谱法测定海水中的苯系物的平均加标回收率为83％~113％，相对标准偏差为1.1％~5.4％（n =3）；苯系物的海水中检出限为0.02~0.1μg/ L。本文建立的蒸气顶空富集-自动顶空气相色谱法简单快速，重现性好，回收率高，适用于海水中痕量苯系物的分析测定。
채용증기정공부집-자동정공기상색보법，연구료해수중흔량분계물（포괄분、갑분、을분、대이갑분、간이갑분、린이갑분화분을희）적측정방법，우화료증기부집작위해수중분계물예처리방법적삼수。대기정류관장도、회수냉응액체적、흡수개질등영향부집효과적관건인소진행료평개，병우화료색보조건，고찰방법적정밀도화회수솔。결과표명，대체적수양경과10 cm 장도냉응관적이차냉응부집，이수작위흡수제，1 L 수양부집농축지10 mL 후，가사원유자동정공기상색보분석분계물적령민도제고1~2개수량급。채용증기정공부집-정공기상색보법측정해수중적분계물적평균가표회수솔위83％~113％，상대표준편차위1.1％~5.4％（n =3）；분계물적해수중검출한위0.02~0.1μg/ L。본문건립적증기정공부집-자동정공기상색보법간단쾌속，중현성호，회수솔고，괄용우해수중흔량분계물적분석측정。
BTEX(including benzene,toluene,ethylbenzene,p,m,o - xylene and styrene)in sea water determined by a vapor dynamic headspace enrichment euipment and automatic headspace - gas chromatography. The main operating parameters of this enrichment device,such as length of distillation tube,Enrichment conditions for the water preparation were optimized through a series of tests. The chromatography condition was optimized,and the method recoveries with the relative standard deviations were evaluated. The results showed that one liter of water sample could be concentrated to 10 mL throuth twice distillation and the sensitivity of traditional automatic headspace - gas chromatography could be improved 1 ~ 2 orders of magnitude. The range of average recovery was 83% ~ 113% ,the RSD was 1. 1% ~ 5. 4%(n =3),and the detection limit was 0. 02 ~ 0. 1 μg/ L for the determination of BTEX in seawater by the vapor dynamic headspace enrichment euipment and automatic headspace - gas chromatography. This proposed method offered a number of benefits including simple,rapid,good reproducibility,high recovery and suitable for determination of BTEX in sea water.