CAJ | 학술논문

[目的]探讨塞曼效应石墨炉原子吸收光谱法直接测定乳汁铅的方法.[方法]样品不用前处理,采用标准曲线法,用基体改进剂以1∶4稀释后直接进样测定,并进行了质量控制分析.[结果]方法的线性范围为(0～150)μg/L.批内精度(RSD%)在2.1～6.0之间,批间精度(RSD%)在5.8～8.1之间,特征浓度是1.0 μg/L,检出限:当3σ时是0.3μg/L,回收率在96.7%～103.9%之间.分析的血铅标准物质(SRM 955,美国标准物质局生产)值是(58.6±3.2)μg/L,与其参考值(57.0±5.0)μg/L比较,在误差范围内.[结论]方法灵敏、简单,准确度和精密度都符合要求.
[목적]탐토새만효응석묵로원자흡수광보법직접측정유즙연적방법.[방법]양품불용전처리,채용표준곡선법,용기체개진제이1∶4희석후직접진양측정,병진행료질량공제분석.[결과]방법적선성범위위(0～150)μg/L.비내정도(RSD%)재2.1～6.0지간,비간정도(RSD%)재5.8～8.1지간,특정농도시1.0 μg/L,검출한:당3σ시시0.3μg/L,회수솔재96.7%～103.9%지간.분석적혈연표준물질(SRM 955,미국표준물질국생산)치시(58.6±3.2)μg/L,여기삼고치(57.0±5.0)μg/L비교,재오차범위내.[결론]방법령민、간단,준학도화정밀도도부합요구.
[Objective] To study the method for determining human milk lead by Graphite Furnace Atomic Absorption Spectrometry(GFAAS). [Methods] Human milk lead was determined by GFAAS.The sample was diluted 1:4 in volume with the matrix modifier and nitric acid,the standard calibration curve was employed and the quality control was executed.Lead in milk sample was determined directly by GFAAS without digestion. [ Results] The lead concentration curve was linear within the range of(0～ 150)μg/L. The precision(RSD% )was 2.1 ～ 6.0 for within-batch and 5.8 ～ 8.1 for between-batch. The limit of detection was 0.3 μg/L, based on three times the S.D.The determined lead level of the SRM 955 blood lead reference material from National Bureau of Standard(NBS in USA) was(58.6±3.2) μg/L. It was within the permissible error range compared to the reference value(57.0 ± 5.0)μg/L. [Conclusion] The proposed method is sensitive and simple. The accuracy and precision can meet the requirement.