Heavy granular superphosphate (GTSP) is a high concentration of water-soluble phosphate available, the available phosphorus content is SSP (SSP) of 2.5 ~ 3.0 times.
The method has been used to determine trace iodine and watersolublephosphorus in soil with satis factory results in the presence of water-soluble polymers.
在水溶性高分子存在下，对土壤中水溶性磷及痕量碘进行了高灵敏度的测定。
3
A new method is set up to determine the water-soluble and available phosphorus in diammonium phosphate by the application of ultrasonic wave to solve the sample.