CAJ | 학술논문

　　目的采用低压浓缩柱来富集食品接触材料提取液中的微量铅。方法样品用煮沸的4%乙酸浸泡,后经流动注射系统(FIA)与甲基百里酚蓝(MTB)螯合显色,最后用分光光度法进行测定。结果在最佳实验条件下,该方法在2~90μg/L的范围内,铅质量浓度与峰高成良好线性关系,相关系数r=0.9991,相对标准偏差为1.6%(20μg/L Pb, n=10),方法的检出限为0.34μg/L。结论这种低压浓缩柱对溶液中的微量铅具有良好的富集作用,与FIA联用,可实现快速在线分析。
　　목적채용저압농축주래부집식품접촉재료제취액중적미량연。방법양품용자비적4%을산침포,후경류동주사계통(FIA)여갑기백리분람(MTB)오합현색,최후용분광광도법진행측정。결과재최가실험조건하,해방법재2~90μg/L적범위내,연질량농도여봉고성량호선성관계,상관계수r=0.9991,상대표준편차위1.6%(20μg/L Pb, n=10),방법적검출한위0.34μg/L。결론저충저압농축주대용액중적미량연구유량호적부집작용,여FIA련용,가실현쾌속재선분석。
Objective To enrich trace lead in food contact materials by low concentration column. Me-thods Samples were extracted by 4%boiled acetic acid, reacted with methyl thymol blue in FIA. Chelate was de-tected by spectrophotometry. Results The linear range of standard solutions was from 2 μg/L to 90 μg/L (correla-tion coefficient r=0.9991). The relative standard deviation (RSD) was 1.6%(n=10) obtained by injecting standard solution with 50μg/L lead. The detection limit was 0.34 μg/L. Conclusion This new concentration column is feasible in the enrichment of trace lead from aqueous solutions. It can be used as a fast online analysis method combined with FIA.