中华人民共和国国家环境保护标准HJ921-2017土壤和沉积物有机氯农药的测定气相色谱法Soil and sediment—Determination of organochlorine pesticides—Gas chromatography（发布稿）本电子版为发布稿请以中国环境出版社出版的正式标准文本为准2017-12-28发布2018-04-01实施环境保护部 发布目次前言.................................................................................................................................................ii1适用范围.......................................................................................................................................12规范性引用文件...........................................................................................................................13方法原理.......................................................................................................................................14试剂和材料...................................................................................................................................15仪器和设备...................................................................................................................................26样品...............................................................................................................................................37分析步骤.......................................................................................................................................48结果计算与表示...........................................................................................................................69精密度和准确度...........................................................................................................................710质量保证和质量控制.................................................................................................................711废物处理.....................................................................................................................................8附录 A（规范性附录）方法的检出限和测定下限........................................................................