论文部分内容阅读
研究了在咪唑存在下,meso四(4羧甲氧基苯)卟啉〔TCMOPPH2〕和Cd(Ⅱ)所形成的卟啉络合物Cd(Ⅱ)TCMOPP与Mn(Ⅱ)间的置换反应.结果表明,在弱碱性介质(pH=80)中,室温条件下该反应能快速完成,且反应产物Mn(Ⅱ)TCMOPP立即被水中的溶解氧氧化为Mn(Ⅲ)TCMOPP卟啉络合物.其最大吸收波长在4720nm.Mn(Ⅱ)的浓度在1.1～1100ng/mL范围内服从比尔定律,桑德尔灵敏度为05×10-3μg/cm2.该方法具有一定的选择性,应用于油田地下水中Mn(Ⅱ)的测定,结果满意.
The displacement reaction between TCMOPP and Mn (Ⅱ) of porphyrin complex Cd (Ⅱ) formed by meso tetrakis (4-carboxymethoxybenzene) porphyrin [TCMOPPH2] and Cd (Ⅱ) was studied in the presence of imidazole. The results show that the reaction can be rapidly completed at room temperature in mild alkaline medium (pH = 80), and the reaction product of Mn (Ⅱ) TCMOPP is immediately oxidized by the dissolved oxygen in water to Mn (Ⅲ) TCMOPP porphyrin complex .The maximum absorption wavelength is 4720nm.The Beer’s law is obeyed in the range of 1.1 ~ 1100ng / mL for Mn (Ⅱ), and the sensitivity of Sander is 05 × 10-3μg / cm2.The method has certain selectivity and is applied to groundwater of oilfield In the determination of Mn (Ⅱ), the results are satisfactory.