乙基罗丹明B分光光度法测定富氮合金中的微量锌  

Determination of Trace Zinc in Nitrogen-Rich Alloy by Ethyl Rhodamine B Spectrophotometry

作　　者：张东升[1] 徐刚[2] 

机构地区：[1]水城钢铁有限责任公司技术中心,贵州省六盘水市钟山北路区巴西路553028 [2]重庆科技学院安全工程学院,重庆市沙坪坝区虎溪大学城东路20号401331

出　　处：《光谱实验室》2014年第5期551-555,共5页Chinese Journal of Spectroscopy Laboratory

摘　　要：在表面活性剂阿拉伯树胶存在下，研究了Zn（Ⅱ）-SCN-ERB三元显色反应体系，结果表明：在稀盐酸介质中，Zn（Ⅱ）-SCN-ERB在室温下能够形成1：4：2的红色络合物，络合物的最大吸收波长为625nm，锌含量在0．15-8．00μg/25mL范围内符合比尔定律，摩尔吸光系数ε625为1．98×10^5L·mo1^-1·cm^-1，检出限0．045μg／25mL，用该方法测定富氮合金中微量锌，相对标准偏差小于4％，加标回收率在97．8％—101．0％之间，结果满意。In the presence of the surfaetant gum Arabic, the Zn（II）-SCN-ERB ternary chromogenic reaction system was studied. The results showed that, in the Dilute hydrochloric acid, Zn（Ⅱ）-SCN-ERB forms a red complex of one ： four ： two at room temperature. The complex has a maximum absorption wavelength of 625nm, a zinc content of 0.15 — 8.00pg/25mL conforming to the Lambert-Beer＇s law, a molar absorption coeftieient ε625 of 1.98× 105 L·mol^-1·cm^-l and a detection limit of 0.0451μg/25mL. Using this method to determine the trace zinc in Nitrogen-rich alloy, the relative standard deviation is less than 4%and the recovery of 97.8%—101% with results are satisfactory.

关 键 词：锌(Ⅱ) 硫氰酸钾 乙基罗丹明B 分光光度法 

分 类 号：O657.32[理学—分析化学]