Abstract
Determination of strontium in environmental water was studied by a coprecipitation method with barium carbonate and the subsequent X-ray fluorescence analysis. Fifty mg of barium ion and 1 g of sodium carbonate were added to sample water, which was then mixed for one hour by a magnetic stirrer. Precipitate was gathered onto a membrane filter paper to measure its XF inten-sity. The amount of strontium from 2 to 150μg could be repeatedly determined by means of the calibration curve method and the limit of detection was found to be 0.6μg of strontium. A large amount of calcium and magnesium ions was found to interfere with the coprecipitation of stron-tium ion. However, this interference could be eliminated by using a small amount of sample water. Strontium in several environmental waters was determined by the above method. The results obtained from the calibration curve method and the standard addition method agreed with each other, and also agreed with those from the atomic absorption spectrometry.
