γ-氯丙基三乙氧基硅烷改性纳米Si-HAP分离富集-火焰原子吸收光谱测定水样中痕量的锰、钴、镍

Determination of trace manganese, cobalt and nickel in water by flame atomic absorption spectrometry after separation/preconcentration with nanometer silicon hydroxyapatite (Si-HAP) modified with 3-chloropropyl trimethoxy silane

中文关键词:  γ-氯丙基三乙氧基硅烷改性纳米Si-HAP  分离富集  锰  钴  镍  火焰原子吸收法

英文关键词:nanometer Si-HAP modified with 3-chloropropyl trimethoxy silane  separation and preconcentration  manganese  cobalt  nickel  flame atomic absorption spectrometry

中文摘要:

      目的 建立γ-氯丙基三乙氧基硅烷改性纳米Si-HAP分离富集-火焰原子吸收法测定痕量锰、钴、镍的新方法。方法 研究γ-氯丙基三乙氧基硅烷改性纳米Si-HAP在不同pH、吸附温度和时间、洗脱条件及共存离子对锰、钴、镍分离富集的影响。结果 在最佳吸附条件下, 该方法检出限分别为锰0.21 μg/L, 钴 0.18 μg/L, 镍0.24 μg/L, 相对标准偏差分别为锰0.90 %(1 μg/mL), 钴0.78 %(2 μg/mL), 镍0.18 %(5 μg/mL) (n=11), 样品加标回收率在95.0 %~108.0 %之间。结论 该方法适用于水样中痕量锰、钴、镍的测定。

英文摘要:

      Objective To establish a new method for the determination of trace manganese (Mn), cobalt (Co) and nickel (Ni) by flame atomic absorption spectrometry after separation/preconcentration with nanometer silicon hydroxyapatite (Si-HAP) modified with 3-chloropropyl trimethoxy silane. Methods The effects of different pH, adsorption temperature and time, elution conditions and co-existing ions on the separation and enrichment of Mn, Co and Ni by Si-HAP modified with 3-chloropropyl trimethoxy silane were studied. Results Under the optimum conditions, the limits of detection were 0.21 μg/L, 0.18 μg/L and 0.24 μg/L for Mn, Co and Ni, respectively. The relative standard deviations for the elements were 0.90 %, 0.78 % and 0.18 % for Mn (1 μg/mL), Co (2 μg/mL) and Ni (5 μg/mL) (n=11), and the recoveries were in the range of 95.0%~108.0%. Conclusion This method is suitable for the determination of trace Mn, Co and Ni in water samples.