中华人民共和国国家环境保护标准HJ635—2012土壤水溶性和酸溶性硫酸盐的测定重量法Soil-Determinationofwater-solubleandacid-solublesulfate-Gravimetricmethod（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I目次前言.............................................................................................................................................II警告..................................................................................................................................................11适用范围....................................................................................................................................12规范性引用文件........................................................................................................................13术语和定义................................................................................................................................14方法原理....................................................................................................................................15干扰和消除................................................................................................................................16试剂和材料................................................................................................................................27仪器和设备................................................................................................................................38样品............................................................................................................................................39分析步骤....................................................................................................................................410结果计算与表示........................................................................................................................511精密度和准确度..........
