聚磷酸铵肥料聚合度与聚合率测定方法比较

发布时间：2018-01-30 10:36

本文关键词： 聚磷酸铵端基滴定纸层析钼蓝比色钼黄比色　出处：《新疆农业科学》2017年10期 　论文类型：期刊论文

【摘要】：【目的】研究水溶性聚磷酸铵核心指标及相应测定方法,建立相关测定标准。【方法】采用端基滴定法与纸层析法对标准样品和肥料样品的聚合度测定结果进行对比分析;通过比较钼蓝比色法、钼黄比色法以及纸层析法三种方法对标准样品和肥料样品聚合率测定结果的准确性。【结果】端基滴定法与纸层析法标准曲线拟合性良好,分别为:y=0.944 3 x+0.317,(R2=0.999 8);y=-0.237 6 x+0.192 5(R2=0.999 6);端基滴定法测定聚合度时第一突跃点明显,而第二突跃点不明显或无突越显示,且测定值偏小;纸层析法可同时测得不同聚合态磷,所得聚合度较端基滴定法更为准确。对混合标样聚合率测定发现,不同测定方法聚合率相对误差表现为:纸层析钼黄比色法钼蓝比色法(8.73%5.55%1.20%)。【结论】农用肥料级水溶性聚磷酸铵,纸层析法与钼蓝比色法应可被作为测定聚磷酸肥料聚合度及聚合率合理的测定方法。
[Abstract]:[objective] to study the core index of water-soluble ammonium polyphosphate and its corresponding determination method. [methods] the results of polymerization degree of standard samples and fertilizer samples were compared and analyzed by end group titration and paper chromatography. The method of molybdenum blue colorimetry was compared. Three methods, molybdenum yellow colorimetric method and paper chromatography method, were used to determine the polymerization rate of standard samples and fertilizer samples. [results] the standard curves of terminal titration and paper chromatography were fitted well. The results were as follows: 0. 944 3 x 0. 317 R2, 0. 999 8; Yam-0.237 6 x 0.192 5 R2N 0.999 6; The first jump point was obvious when the polymerization degree was measured by the end group titration, but the second jump point was not obvious or the second jump point was not obvious, and the measured value was small. Different polymeric phosphorus can be determined by paper chromatography and the degree of polymerization is more accurate than that by end group titration. The relative errors of the different methods were as follows: paper chromatography, molybdenum yellow colorimetry, molybdenum blue colorimetry, 8.73, 5.551.20. [conclusion] Water-soluble ammonium polyphosphate in agricultural fertilizer grade. Paper chromatography and molybdenum blue colorimetry can be used to determine the polymerization degree and polymerization rate of polyphosphate fertilizer.
【作者单位】：新疆生产建设兵团绿洲生态农业重点实验室/石河子大学农学院;深圳市芭田生态工程股份有限责任公司;
【基金】：国家自然科学基金项目(41161047) 深圳芭田公司横向课题~~
【分类号】：TQ440.72
【正文快照】： 2.深圳市芭田生态工程股份有限责任公司,广东深圳518057)0引言【研究意义】磷肥是世界上最早应用的化学肥料,自1843年过磷酸钙作为世界上第一种化学肥料问世以来[1,2],磷肥的生产与施用已有100多年历史[3]。然而,由于磷在土壤中与钙、铁、铝氧化物等发生沉淀反应,极易固定,造

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