摘要
利用超声波-氟离子选择性电极法对红茶、绿茶两种茶叶中氟含量进行测定,并对影响测定结果的一些因素进行了研究。结果红茶、绿茶中氟含量分别为120.70、106.57 mg/kg,该测定方法的加标回收率为93.50%~109.60%。结果表明超声波-氟离子选择性电极法操作简单,回收率高,能满足对茶叶样品的测定。
Using ultra-fluorine ion selective electrode method for fluorine content in black tea,green tea two kinds of tea were measured and studied some factors influencing the determination results.Results fluorine content in black tea,green tea were 120.70 and 106.57 mg/kg less than China’s agriculture industry standard,the determination method of standard addition recovery was 93.50 %~109.60 %.Results showed that ultrasonic-fluorine ion selective electrode method simple operation,high energy recovery of the sample is meet for tea.
出处
《广东化工》
CAS
2013年第15期179-179,181,共2页
Guangdong Chemical Industry
关键词
超声波萃取
茶叶
氟含量
离子选择性电极
ultrasonic extraction
tea
fluorine content
ion selective electrode
