摘要
采用双波长K系数分光光度法同时测定饮料中的日落黄和柠檬黄,其中日落黄的回归方程为A1/A2=0.9083+2·604×10^(-2)c/A2,r_日=0.9998,线性范围为5～60μg/mL,柠檬黄的回归方程为A1/A2=0.9105+3.204×10^(-2)c/A2,r_柠=0.9999,线性范围为10～55μg/mL。对实际样品的测定表明,日落黄的加标回收率为99.72％,柠檬黄的加标回收率为94.76％,比双波长法更符合要求。
This paper reports a dual wavelength K-factor spectrophotometric method to measure tartrazine and sunset yellow in beverage. The regression equation of sunset yellow is A1/A2 = 0. 9083 + 2. 604 ×10^(-2) c/A2 , rH = 0.9998, the linear sange is 5-60μg/mL; the regression equation of tartrazine is A1/A2= 0. 9105 + 3. 204×10^(-2) c/A2 ,r(?) = 0. 9999, the linear range is 10-55μg/mL. According to the analysis of actual samples,the recovery rate of sunset yellow is 99. 72% ,that of tartrazine is 94. 76%, the method is better than the standard dual wavelength spectrophotometric method. It is simple and convenient.it has high accuracy and is easy to carry out.
出处
《化学试剂》
CAS
CSCD
北大核心
2003年第2期98-99,共2页
Chemical Reagents
