FIA-催化动力学法在线测定制革用水HCO_3^-和CO_3^(2-)  

Catalytic Kinetic Determination of Bicarbonate and Carbonate in Leather Water by FIA

作　　者：俞凌云[1,2] 尚永昌 安胜波 卢艳青 张新申[2] 

机构地区：[1]四川出入境检验检疫局技术中心,四川成都610041 [2]四川大学制革清洁技术国家工程实验室,四川成都610065 [3]河北先河环保科技股份有限公司,河北石家庄050035

出　　处：《中国皮革》2011年第11期46-49,55,共5页China Leather

基　　金：国家863课题(2007AA09210101)

摘　　要：根据三价铬与二甲酚橙在碳酸氢根或碳酸根的催化作用下发生的显色反应,建立了流动注射催化动力学分光光度法,对水中的碳酸氢根和碳酸根浓度进行了检测。通过对各种影响因素进行优化,确定最佳分析条件为:波长550nm,温度75℃,反应圈3.9m,进样环体积250μL,R1显色液二甲酚橙的浓度为0.004g/L,R2显色液硝酸铬的浓度为0.04mol/L。HCO3-和CO32-含量在10～220mg/L范围内峰高与浓度成正比,线性相关系数为R2=0.9987,精密度RSD=0.609%(n=10)。用该法检测实际水样中的碳酸氢根时,加标回收率为97.88%～99.47%,具有良好的重现性和准确性。A flow injection catalytic kinetic spectrophotometic method was developed for the rapid determination of bicarbonate and carbonate in water. The chromogenic reaction of trivalent chromium and xylenol orange is catalysed by bicarbonate and carbonate under heating condition. The optimum analysis conditions are as follows： detection wavelength is 550nm, temperature is 75℃ ; the length of the reaction coil is 3.9m; the volume of the sampling loop is 250μL; the concentration of chromogenic reagent R （ xylenol orange） is 0.004g/L and the concentration of chromogenic reagent R2 （ Chromium Nitrate） is 0.04mol/L. When the concentration of bicarbonate and carbonate was between 10mg/L and 220mg/L, the peak height was proportional was to the content of bicarbonate; the linear correlation coefficient is 0.998 7 ; the relative standard deviation is 0. 609% measuring 10 times repeatedly. And the method is used to determine the content of bicarbonate in several samples, and it shows its good reproducibility and accuracy, with the recoveries of standard addition between 97.88% and 99.47%.

关 键 词：碳酸氢根 碳酸根 流动注射 在线 制革用水 

分 类 号：TS58[轻工技术与工程—皮革化学与工程]