中华人民共和国国家环境保护标准HJ491-2019代替HJ491-2009土壤和沉积物铜、锌、铅、镍、铬的测定火焰原子吸收分光光度法Soilandsediment—Determinationofcopper,zinc,lead,nickelandchromium—Flameatomicabsorptionspectrophotometry（发布稿）本电子版为发布稿。请以中国环境出版集团出版的正式标准文本为准。2019-05-12发布2019-09-01实施生态环境部发布i目次前言...............................................................................................................................................ii1适用范围.......................................................................................................................................12规范性引用文件...........................................................................................................................13方法原理.......................................................................................................................................14干扰和消除...................................................................................................................................15试剂和材料...................................................................................................................................26仪器和设备...................................................................................................................................37样品...............................................................................................................................................38分析步骤.......................................................................................................................................59结果计算与表示...........................................................................................................................610精密度和准确度.........................................................................................................................611质量保证和质量控制.................................................................
