hj 634-2012 土壤 氨氮、亚硝酸盐氮、硝酸盐氮的测定 氯化钾溶液提取-分光光度法

hj 634-2012 土壤 氨氮、亚硝酸盐氮、硝酸盐氮的测定 氯化钾溶液提取-分光光度法

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时间:2018-05-22

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1、中华人民共和国国家环境保护标准HJ634—2012土壤氨氮、亚硝酸盐氮、硝酸盐氮的测定氯化钾溶液提取-分光光度法Soil-Determinationofammonium,nitriteandnitratebyextractionwithpotassiumchloridesolution-spectrophotometricmethods(发布稿)本电子版为发布稿。请以中国环境科学出版社出版的正式标准文本为准。2012-02-29发布2012-06-01实施环境保护部发布目次前言·············

2、······························································································································II1适用范围·························································································································

3、······12规范性引用文件···················································································································13方法原理······················································································································

4、·········14试剂和材料···························································································································15仪器和设备············································································································

5、···············46样品·······································································································································57分析步骤······························································································

6、·································58结果计算与表示···················································································································79精密度和准确度························································································

7、···························810质量保证和质量控制········································································································9附录A(资料性附录)本标准与ISO/TS14256-1:2003(E)的章条编号对照·····················10附录B(资料性附录)本标准与ISO/TS14256-1:2003(E)的技术性差异及其原因

8、·········12附录C(资料性附录)还原柱的制备······················································································13I前言为贯彻《中华人民共和国环境保护法》,保护环境,保障人体健康,规范土壤中氨氮、亚硝酸盐氮、硝酸盐氮的测定方法,制订本标准。本标准规定了测定土壤中氨氮、亚硝酸盐氮、硝酸盐氮的氯化钾溶液提取-分光光度法。本标准的技

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