CAJ | 학술논문

提出了纳米硅羟基磷灰石(Si-HAP)分离富集,火焰原子吸收光谱法(FAAS)测定水样中痕量铅的新方法.考察了铅在纳米Si-HAP上的吸附动力学、最佳酸度和吸附容量.实验结果表明:在最佳实验条件下,纳米Si-HAP能定量、快速地吸附水中的痕量Pb~(2+),其静态吸附容量24.33 mg/g;吸附在纳米 Si-HAP上的 Pb~(2+) 可用0.01 mol/L EDTA-Ca 完全洗脱.本法对 Pb~(2+) 的检出限为1.33 ng/mL,相对标准偏差为4.0%(n=11,c=1 μg/mL),加标回收率在94.9%～102.0%之间.方法用于实际水样中铅的测定,结果满意.
제출료납미규간기린회석(Si-HAP)분리부집,화염원자흡수광보법(FAAS)측정수양중흔량연적신방법.고찰료연재납미Si-HAP상적흡부동역학、최가산도화흡부용량.실험결과표명:재최가실험조건하,납미Si-HAP능정량、쾌속지흡부수중적흔량Pb~(2+),기정태흡부용량24.33 mg/g;흡부재납미 Si-HAP상적 Pb~(2+) 가용0.01 mol/L EDTA-Ca 완전세탈.본법대 Pb~(2+) 적검출한위1.33 ng/mL,상대표준편차위4.0%(n=11,c=1 μg/mL),가표회수솔재94.9%～102.0%지간.방법용우실제수양중연적측정,결과만의.
A new method for the determination of trace Pb with nanometer-sized Si-HAP separation/preconcentration followed by flame atomic absorption spectrometry determination was proposed. The adsorption kinetics, effect of pH, and adsorption capacity of Pb~(2+) on nanometer-sized Si-HAP were studied. It was found that trace Pb could be adsorbed on nanometer-sized Si-HAP under the optimum conditions and was completely eluted by 0.01 mol/L EDTA-Ca. The static adsorption capacity of Pb~(2+) on nanometer-sized Si-HAP was 24.33 mg/g . The detection limit of the method for Pb was 1.33 ng/mL with a relative standard deviation of 4.0% (n=11, c=1 μg/mL). The method was used to determine trace Pb in water samples with recovery in the range of 94.9%～102.0%.