硼锰钙镁磷肥中枸溶性硼的测定乐文（云南省光明磷化工总厂６５０３００）近年来国外市场需求含硼锰的钙镁磷肥，但对其枸溶性硼的测定方法报导甚少；虽然极谱法、萤光光度法测硼灵敏度高，快速准确，但仪器昂贵，中小企业难以购置。甘露醇直接滴定法快速简便，准确度也高... Determination of Boron, Manganese, Calcium and Magnesium Phosphate in Soluble Boron Le Wen (Yunnan Guangming Phosphorus Chemical Industry General Factory 650300) In recent years, demand for boron and manganese in the foreign market of calcium and magnesium phosphate fertilizer, but the method of determination of citric acid soluble boron reported little; although Polarography, fluorescence spectrophotometry boron high sensitivity, fast and accurate, but expensive instruments, SMEs difficult to purchase. Mannitol direct titration is quick and easy, with high accuracy.