有机肥中五氧化二磷的快速测定
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摘要
以鸡粪发酵有机肥为原料,研究有机肥五氧化二磷的测定过程中预消化处理时间、显色反应温度对测定结果的影响,对NY 525—2012中磷测定方法进行改进。在消化处理时可选择室温预消化处理0.5 h后,加热消化分解1 h;在显色反应中,磷酸根离子与偏钒酸和钼酸反应可选择60℃水浴中保温30 s处理。方法改进后能够有效缩短有机肥中五氧化二磷的测定时间(缩短12 h),为有机肥中五氧化二磷的快速测定提供参考。
In the determination of phosphorus pentoxide in organic fertilizer, the effects of pre-digestion treatment time and color reaction temperature on the determination results are studied to improve the determination method of NY 525—2012 based on organic fertilizer fermented by chicken manure. In digestion process, the organic fertilizer can be pre-digested at room temperature for 0.5 h, and then decomposed 1 hours by heat digestion. In the color reaction, the phosphate ion is reacted with metavanadic acid and metamolybdic acid in a water bath under the temperature of 60 ℃ for 30 s. After transformation of the standard method, the determination time of phosphorus pentoxide in organic fertilizer is effectively shorten(12 h), providing a reference for the rapid determination of phosphorus pentoxide in organic fertilizer.
In the determination of phosphorus pentoxide in organic fertilizer, the effects of pre-digestion treatment time and color reaction temperature on the determination results are studied to improve the determination method of NY 525—2012 based on organic fertilizer fermented by chicken manure. In digestion process, the organic fertilizer can be pre-digested at room temperature for 0.5 h, and then decomposed 1 hours by heat digestion. In the color reaction, the phosphate ion is reacted with metavanadic acid and metamolybdic acid in a water bath under the temperature of 60 ℃ for 30 s. After transformation of the standard method, the determination time of phosphorus pentoxide in organic fertilizer is effectively shorten(12 h), providing a reference for the rapid determination of phosphorus pentoxide in organic fertilizer.
引文
[1]农业部.有机肥料:NY 525—2012[S].北京:中国农业出版社,2012.
[2]刘长风,林志锋.有机肥料氮、磷、钾的化学分析方法[J].磷肥与复肥,2006,21(6):61-63.
[3]刘艳梅,温明发.肥料中磷元素的测定方法[J].纯碱工业,2016(1):10-11.
[4]李群.用重量法测定有效磷的质量分数大于5%的有机肥中有效磷的讨论[J].化工管理,2017(20):197.
[5]季卫,陈保华,高飞,等.有机肥料中全磷全钾含量的快速测定[J].北京农业,2010(A1):8-11.
[6]马妮娜.有机肥料中五氧化二磷含量的不确定度评定[J].内蒙古石油化工,2017,43(4):71-73.
[2]刘长风,林志锋.有机肥料氮、磷、钾的化学分析方法[J].磷肥与复肥,2006,21(6):61-63.
[3]刘艳梅,温明发.肥料中磷元素的测定方法[J].纯碱工业,2016(1):10-11.
[4]李群.用重量法测定有效磷的质量分数大于5%的有机肥中有效磷的讨论[J].化工管理,2017(20):197.
[5]季卫,陈保华,高飞,等.有机肥料中全磷全钾含量的快速测定[J].北京农业,2010(A1):8-11.
[6]马妮娜.有机肥料中五氧化二磷含量的不确定度评定[J].内蒙古石油化工,2017,43(4):71-73.