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Chinese National Standard Category: Analysis methods for toxic substances in water |
English Title: | Water quality; Determination of ammonium; Spectrophotometric method with salicylic acid |
Chinese Title: | 水质 铵的测定 水杨酸分光光度法 |
Standard No.: | GB 7481-1987 |
Category No.: | Z16 |
Issued by: | NEPA |
Issued on: | 1987-03-14 |
Implemented on: | 1987-8-1 |
Status: | superseded |
Superseded by: | HJ 536-2009 Water quality-Determination of ammonia nitrogen-Salicylic acid spectrophotometry |
Superseded on: | 2010-4-1 |
Abolished on: | |
Superseding: | |
Word Count: | 2500 words |
Similar Standards: | GB 7492-1987 T/CSUS 28-2021 HJ 593-2010 CJ/T 94-2005 T/BHES 2-2023 DB37/T 4013-2020 DB37/T 3787-2019 GB/T 36084-2018 SL 741-2016 SL 740-2016 SL 739-2016 HJ 686-2014 HJ 676-2013 HJ 550-2009 MT/T 369-2007 MT/T 201-2007 MT/T 202-2007 GB/T 21925-2008 GB/T 21970-2008 SL 391.4-2007 |
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