CAJ | 학술논문

采用原位盐脱水-顶空气相色谱技术对煤焦化废水中的苯酚含量进行了测定。废水经脱水盐吸收后其所含苯酚自然由水相进入气相，用顶空-气相色谱仪进行检测。结果表明：无水氯化钙脱水效果较好；5.2 g无水氯化钙在90℃平衡12 h可完全吸收500μL样品中的水分；顶空分析的平衡温度为150℃、时间为30 min时可达到苯酚的全气化；该方法平行检测的相对标准偏差为4.0%，最低检测极限为3.25μg，回收率在91.1%~104%。方法操作简单、准确性高、无试剂干扰，适于检测煤焦化废水中的苯酚含量。
채용원위염탈수-정공기상색보기술대매초화폐수중적분분함량진행료측정。폐수경탈수염흡수후기소함분분자연유수상진입기상，용정공-기상색보의진행검측。결과표명：무수록화개탈수효과교호；5.2 g무수록화개재90℃평형12 h가완전흡수500μL양품중적수분；정공분석적평형온도위150℃、시간위30 min시가체도분분적전기화；해방법평행검측적상대표준편차위4.0%，최저검측겁한위3.25μg，회수솔재91.1%~104%。방법조작간단、준학성고、무시제간우，괄우검측매초화폐수중적분분함량。
An in-situ salt-dehydration headspace gas chromatography technique has been used for the determination of phenol content in coking wastewater. After the wastewater has been absorbed by anhydrous salt ,its phenol content can naturally be converted from aqueous phase into vapor phase ,and then be analyzed by headspace gas chromatog-raphy. The results show that anhydrous CaCl2 has better dewatering effect. The addition of 5.2 g of anhydrous CaCl2 could fully absorb 500μL of water from the sample in an oven at equilibrium temperature 90℃for 12 h. When the equilibrium temperature of headspace analysis is 150 ℃,phenol can be fully evaporated in 30 min. The relative standard deviation of parallel detection of this method is 4.0%,the lowest detection limit 3.25μg,and the recovery rate is ranged from 91.1%to 104%. The method is characterized by simple operation,high accuracy,and no reagent interference,and suitable for the determination of phenol content in coking wastewater.