Abstract
We investigated the applicability of the method that uses enzyme reagents for the measurement of magnesium in salt and brine.
The results were as follows:
1)Thecalibration curve of magnesium was linear until 100mg/l.
2) The measurement times took 3 minutes.
3) The amounts of sodium chloride of 100-1,000 times that of magnesium did not affect the measurement of magnesium. Also, that of calcium of 1-8 times and potassium of 2-10 times did not affect this measurement.
4) The fluctuation coefficient of ten repeated analyses was about 2%.
5) The determination value by the enzyme reagent method agreed well with that by chelatometric titration method.
Thus, we confirmed that the enzyme reagent method could be used for the measurement of magnesium in salt and brine.
