This paper introduces the LVR-SA-I direct-reading Ion Meter for the determination of fluorine content in beverages and foods. The average recovery rate is 101.58%, and the variation coefficient is 14.3~.323%. It is simple, fast, and the cost of the instrument is low, so it is a good method worthy of suggestion.
The determination method of fluorine in food generally adopts the standard curve method of fluoride ion selective electrode [see "Physical and Chemical Parts of Food Sanitation Inspection Methods" 1, 58-61 release]. Although this method is accurate and reliable, it is complicated to operate and takes a long time. The acidity meter used is expensive.
The LvR-SA-I direct-reading Ion Meter uses a standard addition method to measure the fluorine content in the sample solution. After adding the standard solution, the sample volume can be automatically corrected, and the direct-reading result only takes a few minutes for each sample. The method is simple and accurate, and the cost of the instrument is low.
We have compared the accuracy, precision and beverage sample detection of LVR-SA-I direct-reading Ion Meter with the ministry-promulgated acidity meter method in the determination of fluorine content in beverages. The report is as follows:
