络合捕集—火焰原子吸收法测定矿泉水中微量铁、铜、锰、锌、镉  

Atom Absorb Spectrum Law Determine Micro-Fe Cu Mn Zn Cd of the Mineral Water

作　　者：欧阳云[1] 曹军[1] 李华丽[1] 

机构地区：[1]湖南省桂阳县疾病预防控制中心,中国湖南桂阳424400

出　　处：《实用预防医学》2004年第1期72-74,共3页Practical Preventive Medicine

摘　　要：目的　建立用 1-[2 -吡啶偶氮 ] -2萘酚 (PAN)测定矿泉水中微量铁、铜、锰、锌、镉的火焰原子吸收分析方法。　方法　采用PAN作为微量铁、铜、锰、锌、镉的捕集剂及沉淀剂 ,运用三氯甲烷溶解 ,硝酸反萃取 ,火焰原子吸收光谱法测定。　结果　最低检测浓度分别为 0 .16、0 .10、0 .0 80、0 .0 3 3、0 .0 5 8μg ml;线性范围分别为 0 .0 0～ 1.0、0 .0 0～0 .5 0、0 .0 0～ 0 .5 0、0 .0 0～ 0 .2 5、0 .0 0～ 0 .2 5 μg ml ;测定样品中五种金属离子的相对标准偏差 (RSD)分别为 2 .7%、1.9%、4.7%、3 .2 %、3 .6% ;样品加标回收率分别为 94.5 %～ 96.0 %、92 .0 %～ 10 1.3 %、95 .5 %～ 10 5 .0 %、94.0 %～ 10 5 .0 %、97.5 %～ 10 2 .3 %。　结论　矿泉水中微量铁、铜、锰、锌、镉用PAN富集浓缩后 ,可以用原子吸收光谱法测定 ,灵敏度、准确度均达到分析要求。Objective To set up the same analytical method of the micro-iron, copper,manganese, zinc, cadmium in mineral water. Methods Adopt 1-[2-pyridlazo]-2 naphthol as the catch-collecting pharmaceutical and the precipitating agent of the micro-iron, copper, manganese, zinc, cadmium, Using chloroform dissolve, nitric acid extract instead, atom absorb spectrum lam determine. Result The dectextion limit is 0.020 μg/ml?0.0080 μg/ml?0 010 μg/ml?0 0040 μg/ml?0 0015 μg/ml respectively, and the limit range is 0～1.00 μg/ml?0～0.50 μg/ml?0～0.50 μg/ml?0～ 0.25 μg/ml?0～0.25 μg/ml respectively. The respective relatively standard deviation(RSD) of the five sample metalion is 2.7%?1.9%? 4.7% ? 3.2% ?3.6%, the sample adding standard of the recovery is 94.5%～96.0%?92.0%～ 101.3% ?95.5%～105.0%? 94.0% ～ 105.0% ?97.5%～102.3%. Conclusion After PAN rich collecting condensing, the micro-iron copper, manganese,zinc,cadmium in the mineral water can be examined with atom absorb spectrum law and the method is simple and convenient. Both the sensitivity and accuracy can get the analytical require.

关 键 词：火焰原子吸收分光光度法 PAN 微量金属 矿泉水 

分 类 号：R331[医药卫生—人体生理学]