食品科学 ›› 2001, Vol. 22 ›› Issue (11): 82-84.
• 分析检测 • 上一篇 下一篇
王立群, 杨俊, 夏玲
出版日期:
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WANG Li-Qun, Yang-Jun, Xia-Ling
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摘要: 在聚乙烯醇介质中,基于钾离子和四苯硼钠形成稳定的胶体沉淀,建立了流动注射浊度法测定钾的快速分析方法。钾离子浓度在0~25.0μg/ml范围内符合比耳定律,相关系数0.9985。采用微波溶样,测定茶叶中钾,回收率在94.6%~103.4%之间,相对标准偏差小于3%。比较火焰光度法测定,结果满意。
关键词: 流动注射分析, 浊度法, 微波溶样, 茶叶, 钾, 四苯硼钠
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;
王立群, 杨俊, 夏玲. 流动注射浊度分析法测定茶叶中钾的研究[J]. 食品科学, 2001, 22(11): 82-84.
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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