A Study on Trubidimetric Determination of Potassium in Tea by Flow Injection Analysis

Abstract

Abstract: In the polyviny alcohol medium,a flow injection analysis on turbidimetric determination of potassium was studied.The method was based on the reaction of potassium with sodium tetraphenylboron(TPB) to form a stable colloidal precipitation.Beer’ s law was obeyed in the range 0? 25.0μ g/ml of potassium.The samples were digested by microwave.The recovery obtained by standard addition method was 94.6% ? 103.4% .The relative standard deviations obtained (n=8) was less than 3% .The frequency of analysis was 60 samples per hour.The proposed method was rapid,simple and convenient and it has been applied successfully to determine potassium in tea samples.

Key words: , Flow injection analysis Turbidimetry Microwave digestion Tea Potassium TPB；

WANG Li-Qun, Yang-Jun, Xia-Ling. A Study on Trubidimetric Determination of Potassium in Tea by Flow Injection Analysis[J]. FOOD SCIENCE, 2001, 22(11): 82-84.

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A Study on Trubidimetric Determination of Potassium in Tea by Flow Injection Analysis

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