摘要
用定磷试剂代替国标方法中的钼酸铵、对苯二酚和亚硫酸钠溶液与待测液反应生成磷钼蓝进行比色分析测定磷含量,避免了有毒试剂对苯二酚对试验人员的危害及对环境的污染。试验结果表明,改进法提高了测定灵敏度,扩大了被测液的酸度范围,方法的检出限为1.3μg,回收率为96.8%～99.4%,测定结果与国标方法的测定结果比较无显著统计学差别,该方法可用于食品中磷的测定。
In this paper, the reagent of determine phosphorus, other than ammonium molybdate, p- benzenediol and sodium sulfite in GB standard method, was used for the determination of phosphorus by molybdenum blue spectrophotometry. The method was suggested to possess higher sensitivity with the detection limit 1.3μg and more acid tolance towards target solutions. In addition, the usage of toxic p - benzenediol could be avioded. The recovery of the method was in the range of 96.8 % - 99.4%. The determination results of proposed method showed no distinct statistics differences compared with those of GB. The method was used to determine phosphorus in food with satisfactory results.
出处
《福建分析测试》
CAS
2007年第4期86-87,共2页
Fujian Analysis & Testing
关键词
食品
磷
测定方法
改进
Food, Phosphorus, Determination, Improvement
