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1.方法概要:为适应社办磷肥厂化验工作的需要,我们在磷矿石全磷量钼蓝试纸法速测的基础上,进一步对磷肥中有效磷的测定的试纸法进行了试验。经反复实践证明,有效磷测定的试纸法具有简单易行,便于为广大群众所掌握,成本低廉等特点。便于推广使用,特别适用于暂时不具备常规分析化验条件的小磷肥厂及生产队使用。有效磷含量的高低是对磷肥评价的一个主要指标。实践证明,选用2％柠檬酸作浸提剂,试纸法测定结果与常规化学分
1. Summary of Methods: In order to meet the need of laboratory testing of phosphate fertilizer plant, we conducted a test on the test paper method for the determination of available phosphorus in phosphate fertilizer on the basis of the quick test of the total phosphorus content of molybdenum blue in phosphate rock. After repeated practice has proved that the method of determination of available phosphorus test paper is simple, easy to grasp for the masses, low cost and so on. Easy to promote the use of, especially suitable for temporary non-routine analysis of small phosphate fertilizer plant and production team use. The level of available phosphorus is a major indicator of phosphate fertilizer evaluation. Practice has proved that the choice of 2% citric acid extractant, test strip test results and conventional chemical