6U. S. environmental protection agency 1997 guidelines establishing test procedures for the analysis of pollutants(appendixB, part 136, definition and procedures for the determination of the method detection limit)[M]. US Code of Federal Regulations, 1997 : 265-267
7GB/T6913-2008,锅炉用水和冷却水分析方法磷酸盐的测定.
8U.S. environmental protection agency 1997 guidelines establishing test procedures for the analysis of pollutants ( appendixB, part136, definition and procedures for the determination of the method detection limit) [ M]. US Code of Federal Regulations. 1997. 265.