T/CHES 53-2021 Water quality monitoring and analysis method standard preparation technical guidelines

GB/T 1.1-2000 Directives for standardization—Part 1:Rules for the structure and drafting of standards (ISO/IEC Directives, Part 3,1997,Rules for the structure and drafting of international standards, NEQ) GB/T 1.1-2009 Directives for standardization—Part 1:Structure and drafting of standards GB/T 1.1-2020 Directives for standardization—Part 1:Rules for the structure and drafting of standardizing documents GB 3100-1993 SI units and recommendations for the use of their multiples and of certain other units GB/T 3101-1993 Quantities and units—General principles GB/T 3102.1-1993 Quantities and units—Space and time GB/T 7714-1987 Descriptive rules for bibliographic references GB/T 7714-2005 Rules for content，form and structure of bibliographic references GB/T 7714-2015 Information and documentation—Rules for bibliographic references and citations to information resources GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 20001.4-2001 Rules for drafting standards—Part 4:Methods of chemical analysis GB/T 20001.4-2015 Rules for drafting standards—Part 4:Test method standards GB/T 7714-2025 Information and documentation—Rules for bibliographic references and citations to information resources