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

作　　者：任红英 杨小红 REN Hong-Ying, YANG Xiao-Hong(Food Quality and Safety Supervision Inspection Center of Yongzhou City, Yongzhou 425000, Chin)

机构地区：[1]永州市食品质量安全监督检验中心,永州425000

出　　处：《食品安全质量检测学报》2018年第5期1163-1168,共6页Journal of Food Safety and Quality

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p H、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0.21μg/L,钴0.18μg/L,镍0.24μg/L,相对标准偏差分别为锰0.90%(1μg/mL),钴0.78%(2μg/mL),镍0.18%(5μg/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。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.

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 

分 类 号：O657.31[理学—分析化学]