Determination of Co and Ni in tea leaves and As, Cd, Sb, Hg and Pb in nail polishes by FI-CVG-ICP-MS

• Main Authors: Fan-feng Huang, 黃凡鳳
• Other Authors: Shiuh-jen Jiang
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/66688895904848633037

碩士 === 國立中山大學 === 化學系研究所 === 103 === First research analyze Co and Ni in leaves by FI-CVG-ICP-MS. To get better signal in experiments, subsequently testing concentration of 8-hydroxyquinoline, HNO3 and NaBH4. In addition, testing reagent flow rate and volume of mixing coil, too. Gas-liquid separator used in the CVG system separate analytes from the matrix, and thereby reducing the spectral interference of calcium. The existence of the matrix affect the hydride generation efficiency, so we use standard addition as our quantitative method. Under the optimum operating conditions, the detection limit obtained from the curve were in the range of 0.4-3.9 ng g-1 for Co and Ni in tea leaves sample. Besides, the analytical results of SRM 1573a and SRM 1547 determined by standard addition were in a good agreement with certified value. Finally, the method has been applied for determination of Co and Ni in commercially available tea leaves. Second research using slurry sampling as pretreatment, and to determine As, Cd, Sb, Hg and Pb in nail polish by FIA-CVG-ICP-MS. The nail polish slurry containing 0.5% m/v nail polish, 1% m/v thiourea, 0.75 mg L-1 Co and 1.2% v/v HCl. Then, we compare the slope of external calibration and standard addition to ensure that if the matrix will affect the efficiency of vapor generation. We choose standard addition and isotope dilution as our quantitative method. The method has been applied for determination of As, Cd, Sb, Hg and Pb in commercially available nail polish. Under the optimum operating conditions, the detection limit obtained from the curve were in the range of 0.06-12 ng g-1 for As, Cd, Sb, Hg and Pb in nail polish sample.