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Of flame atomic absorption spectrometry technology

12 (5): 1i157 Ming-Hua, Qiu Xueting Spectroscopy and Spectral Analysis, 1996.16 (6): 82 158 Huang Zhong, Ming-Hua. Qiuxue Ting, Zheng Yansheng. Spectroscopy Laboratory, 199 613 (2): 1159 Chang Woon ball, Ming-Hua, Zheng Yansheng. Spectroscopy Laboratory. 1995, l2 (4): 19160 Libin Xian, Zhang Xun, Chen Xian, Zhou Xinliang. Spectroscopy and Spectral Analysis, 1989,9 (2): 52161 + Zhangcheng Hong Wu Yuliang, Zhu Danhong. Spectroscopy Laboratory. 1994, I1 (2): 47162 Wu Yuliang, Zhang Chenghong. Zhu Danhong. Spectroscopy and Spectral Analysis, 1995.15 (2): 85163 Wu Yuliang. Yu Bin + Zhoutian Tong. Analytical Chemistry, 1996.24 (2): 202 Received :1999 -08-30 Deng Bo, male, Professor, Department of Chemistry, Tsinghua University,[link widoczny dla zalogowanych], mainly in instrumental analysis and chemometrics teaching and research. oev, k, p, m ~ ofillumeac pumping fan ~ u, omm'y. m (1fma. fu white island (Deflarga ~ nt cafe cape + dish Uniter cries +, 100084) '20OO No. 1 of the instruments ThedeVd0p \f of a spherical nickel substrate vacuum plated with mercury film electrode and the performance test Zhou Zhiren (Xiang Tan University of ear: _ Tan,[link widoczny dla zalogowanych], 4lll05) developed a summary of spherical nickel substrate vacuum plated with mercury film electrode. 2.5 embedded derivative Polarographic electrode performance of the test ounces in 0.IMKCI in the linear range of Cd 4 × 10 ~ ~ 6 × 1o.. M, restore electrical pull proved stable performance, high sensitivity,[link widoczny dla zalogowanych], good reproducibility Keywords spherical nickel substrate l Introduction mercury film electrode has been widely used for electrochemical analysis. now using pre-coated glassy carbon mercury film electrode, although the high sensitivity, but the surface state of the measured ion peak current greater impact on treatment with an electrode before and after the difficult to ensure reproducibility. People are looking for good reproducibility, sensitivity and glassy carbon electrodes rather, has developed a platinum-plated mercury film electrode vacuum ball ..., platinum plated mercury film electrode ball ammonia I, nickel-platinum ball ammonia-based coated mercury film electrode L3, 4J. of spherical nickel developed a substrate coated mercury film electrode vacuum 【5J, and stripping voltammetry with the electrode performance was examined. In 0.1toolKCl, cadmium linear the range of 4 × lO ~ ~ 6 × 100M, looking from the piecewise linear relationship, 2 × lOlmol cadmium and gaps clearly identifiable; on 3X10I9tool Determination of cadmium 20 times, the relative deviation of 5%. 2 Experimental apparatus and 2,1 Reagent Ⅺ B-s21 (B)-type pole spectrometer, x-Y recorder function, rotating disk electrode, Ag / AgCi reference electrode. saturated sodium sulfite solution, with a large area of mercury cathode electrolysis purification; cadmium standard solution, high purity preparation of 1 × 10M Cadmium stock solution diluted with water when; mercury are more than pure mercury; water, distilled water for the three sub-zeolite Britain. 2.2 electrodes made with the diameter 0.5nma, after a long 12 Ⅻ I deal with high-purity nickel wire in the oxygen gas flame of a certain size will be one end of the firing of small diameter of the ball, remove acid to remove oxide film. diameter 0.3n Ⅲ I also take gold, king of the water boiled in 1min, washed out in a liquid oxygen Shao Rong gas flame at one end and gold will be bonded to nickel-based ball (when making the decision based on the size of the matrix sintered porous nickel wire size), to be evenly distributed in the nickel-gold surface of the ball quickly left the fire. the diameter About 8urn a waste pipette (about 100mm), the firing a good spherical nickel substrate sealed in the glass tube tip burn, just the exposed parts of the globe. on a good production of the same gold electrode surface with the treatment approach to treatment,[link widoczny dla zalogowanych], and then placed in HN: H2S0 |: 2:1 electrolyte plus 1v DC voltage electrolysis 5rain (platinum as the cathode,[link widoczny dla zalogowanych], the electrode as the anode), remove the quick wash is dried, put into a vacuum coating chamber in the mercury film plating. coating on the electrode after the l in 0.1N canthus, along with the reference electrode in a very spectrometer scanning from IV ~ OV 5 times, and then transferred to distilled water and stored for later use. operating process should avoid contact with air, to ride oxidation. 2.3 Conditions for mercury film experimental 0.1mol/LK (21 for the electrolyte, N ~ 2SO3 as oxygen scavenger. on the 2 × 10mol / L cadmium in a 1.0V Rich stirred
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