2,3,7-三羟基-9-(4’-硝基苯基)苯基荧光酮分光光度法测定微量锌  

Spectrophotometric determination of micro zinc with 2,3,7-trihydroxy9-(4'-nitrophenyl)phenylfluorone

作　　者：罗光富[1] 尚静 李明翠[1] 黄应平[1] 

机构地区：[1]三峡大学化学与生命科学学院,湖北宜昌443002 [2]宜昌市微生物研究所,湖北宜昌443000

出　　处：《冶金分析》2005年第4期52-54,共3页Metallurgical Analysis

基　　金：宜昌市科技发展计划项目(A04401-6);三峡大学重大科研基金项目(2003C07)

摘　　要：在阴离子表面活性剂十二烷基磺酸钠(SDS)存在下,研究了新型苯基荧光酮类显色试剂2,3,7-三羟基-9-(4’-硝基苯基)苯基荧光酮(p-NPF)与锌离子显色反应的光度性质和反应特性。在pH 9.3的NH3.H2O-NH4Cl缓冲溶液介质中,所形成的络合物的最大吸收值位于567 nm处,表观摩尔吸光系数为4.01×104。拟定方法用于废水中微量锌的测定,结果满意。In the presence of sodium dodecane sulphonate （SDS）, a spectrophotometric method for determi- nation of micro zinc with a new color reagent 2,3,7-trihydroxy-9-（4＇-nitrophenyl）phenylfluorone（ p- NPF） and its spectrophotometric property have been studied. The results show that the maximum absorp- tion wavelength of p -NPF - Zn - SDS complex was at 567 nm and the apparent molar absorptivity was 4.01 × 10^-4L·mol^-1.·cm^-1 in the buffer solution （pH 9.3 of NH3·H2O- NH4Cl）.The proposed method has been applied to the determination micro-amouns of zinc in waste water with satisfactory results.

关 键 词：2 3 7-三羟基-9-(4’-硝基苯基)苯基荧光酮 锌 分光光度法 

分 类 号：O657.3[理学—分析化学] O614.241[理学—化学]