【摘要】 四（对三甲铵苯基）卟啉，在乙二胺存在下与Ｚｎ（Ⅱ）形成络合物。据此提出了用分光光度法测定微量锌的方法，该络合物最大吸收波长为４２５ｎｍ，表观摩尔吸光系数为３．４２×１０￣５，锌量在０～４．５μｇ／２５ｍＬ范围内符合比尔定律。本法可用于稻米中微量锌的测定。更多还原

【Abstract】 ased on the formation of the complexof Zn(Ⅱ)with meso-tetrakis(4-trimethy-lammonium phenyl)porphine in the pres-ence of ethylene-diamine, a new spectropho-tometric method for the determination oftrace Zn (Ⅱ)has been developed,The ab-sorption maximum of the complex is at425nm and its apparent molar absorptlvity is3.42 × 10￣5L·mol￣(-1)·cm￣(-1)Beer’s law isobeyed from 0 to 4. 5μg/25mL of Zn(Ⅱ).This method can be applied directly to thedetermination of trace Zn(Ⅱ)in rice.更多还原