【摘要】 在(CH2)6N4HCl缓冲溶液中,OP乳化剂的存在下,痕量镍(Ⅱ)对H2O2氧化若丹明B(RhB)的褪色反应有强的催化作用,催化程度与镍(Ⅱ)量线性相关。基于此,建立了一种测定镍(Ⅱ)的分光光度法。结果表明,有色溶液的最大吸收波长为550nm,方法的检出限为04μg·L-1,催化程度与Ni(Ⅱ)量在0～030mg·L-1范围内符合比耳定律,选择性较好,可用于测定非晶态FeNiCr合金中的镍。更多还原

【Abstract】 In (CH 2) 6N 4 HCl buffer solution and in the presence of OP emulsifier trace Ni(Ⅱ) catalyzes strongly the decolorization reaction of Rhodamine B (RhB) by oxidizing with H 2O 2, and its catalytic extent is linear with the contents of Ni(Ⅱ) in a certain range. Based on this study, a novel spectrophotometric method for determining Ni(Ⅱ) was developed. The results show that the maximum absorption of the complex is at 550 nm, the detection limit of the method is 0 4 μ g·L -1 for Ni(Ⅱ), and Beer’s law is obeyed for Ni(Ⅱ) in the range of 0 0 3 mg·L -1 . The method has been applied to the determination of Ni in FeNiCr alloys with satisfactory results.更多还原