GB/T 7493-1987 in English

VALID

quality - Determination of nitrogen (nitrite) - Spectrophotometric method

Issued on:1987-03-06
Implemented on:1987-08-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $40.00
$39.00

Standard No:	GB/T 7493-1987
Document status:	VALID
Title in English:	quality - Determination of nitrogen (nitrite) - Spectrophotometric method
Title in Chinese:	水质亚硝酸盐氮的测定分光光度法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	1987-03-06
Implemented on:	1987-08-01
ICS Classification:	13.060-Water quality
Chinese Classification:	Z16-Analysis methods for toxic substances in water
Professional Classification:	GB-National Standard
Related Keywords:	nitrite nitrogen spectrophotometric method scopethis standard nitrogen method nitrite
Related Topics:	Nitrate nitrogen and nitrate Nitrite Nitrous acid Nitrate wastewater GB 7493-1987 gb 7493 gb+7493-1987 gb7493 GB t 7493 gb7493-1987 Nitrite nitrogen Nitrate nitrogen gb/t7493 gb+7493 Nitrate nitrogen water quality Determination method of nitrite in water water quality analysis spectrophotometry Nitrite spectrophotometry Optical rotation of nitric acid Determination of water acidity Determination method of water quality nitrite Determination method of nitrate nitrogen Determination of nitrate in water quality by ultraviolet spectrophotometry GB/t+7493 Determination of Nitrate Nitrogen Nitrate wastewater gb 7493 1987 gb+7493+1987 Nitrate and Nitrite Nitrite detection method in water Nitrite detection in water Water rotation Determination method of nitrite in water Nitrate Nitrogen Determination Method Water quality nitrite Measuring nitrate nitrogen and nitrite nitrogen Hypohydrochloric acid Water Quality Determination of Nitrate Nitrogen by Ultraviolet Spectrophotometry Nitrite Nitrogen Spectrum The absorption peak of water quality nitrite GB/T 7493-1987 gb/t903-1987 Seawater Nitrate Nitrogen Method Optical rotation of water Nitrate Nitrogen Test Regulations gbt 7493 1987 Water quality Nitrate nitrogen Water quality nitrite Optical path Nitrate Nitrogen Determination Method Titration method for nitrite The general amount of nitrate nitrogen in seawater Water Phosphite Determination of nitrite nitrogen The detection method of nitrite in water Water quality nitrous acid Determination of nitrite in water Hydrofluoric acid spectrophotometry Lanthanum nitrate + fluorescence /t+7493 hydrogen peroxide spectrophotometry Nitrite Nitrogen Detection Method gb/t7493-1987 Nitrite water Water quality nitrite detection Spectral Grade Nitric Acid Detection method of nitrite nitrogen Nitrate and Nitrite Spectrophotometric Nitrogen Photometric method for water quality testing Cerium Sulfate Spectrophotometry Total Nitrogen Spectrophotometer Spectrophotometric hydrogen peroxide photometric nitrate Spectroscopy of ferric hydrochloric acid Total Nitrogen Determination Method Hydrochloric Acid Water Spectrophotometer Absorbance Absorbance Nitrate nitrogen by UV spectrophotometry Nitrate Nitrogen Spectrophotometry Photometric linearity salt rotation Optical rotation water Oleic Acid Luminosity spectrophotometric nucleic acid Nitrate Nitrogen Spectrophotometry Spectrophotometer to measure water Nitrate nitrogen detection method Nitrate nitrogen detection method Nitrate determination spectrophotometric method Spectrophotometric nitrate nitrogen Nitrate nitrogen detection Nitrite Nitrogen Detection Portable Spectrophotometric Method for Determination of Ammonia Nitrogen in Water Quality Nitrate nitrogen detection method Nitrate nitrogen detection spectrophotometric nitrate nitrogen Water quality nitrous acid The best measurement range of spectrophotometry sewage nitrite Determination of Nitrate Nitrogen by Ultraviolet Spectrophotometry Azo Reagent 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quality trace phosphate spectrophotometry Determination method of total nitrogen by spectrometry Nitrate experiment Water quality testing for nitrates Nitrate Nitrogen in Water by UV Spectrophotometry Test method for nitrate nitrogen Detection of Nitrate Nitrogen water nitrate nitrogen Nitrate nitrogen detection method in water Water Quality Spectrophotometry total nitrogen spectrophotometry total nitrogen spectrophotometry Water quality spectrophotometer Spectrophotometric determination of total nitrogen using Nitrate Spectrophotometric Detection Nitrate nitrogen Nitrite determination Water Quality Chlorite Total Nitrogen Determination Spectrophotometry Total Nitrogen Determination Spectrophotometry Spectrophotometric nitrogen content nitrate nitrogen Total Nitrogen Determination Spectrophotometry Aqueous Nickel Spectrophotometry Water quality nitrite detection Total Nitrogen Spectrophotometric Determination Nitrate nitrogen by UV spectrophotometry Water nitrite determination method Water quality iron spectrometry Nitrite detection method Nitric Acid Spectrophotometer Determination of total nitrogen content in water by spectrophotometry Determination of water quality nitrate nitrogen Nitrate nitrogen Spectrophotometric method for determination of hydrogen peroxide Cadmium nitrate + spectrophotometry Nitrate, nitrate nitrogen - Determination method for nitrate nitrogen Photometric method for the determination of total nitrogen Test for Nitrite in Water Determination of nitrate nitrogen in water quality Nitrate water quality Spectrophotometric Nitrate seawater nitrate nitrogen Determination of nitrate nitrogen in water Nitrate nitrogen and nitrate nitrogen Nitrite in wastewater Water rotation Spectrophotometric method for the determination of cod Spectrophotometric method for determination of nitrite in water quality Nitrate method Spectrophotometer total nitrogen Water quality Nitrate Nitrate and Nitrate Nitrogen Detection of Nitrate Nitrogen by Ultraviolet Spectrophotometry Nitrite Photometry Spectrophotometric nitrate nitrogen Spectrophotometer Total Nitrogen Spectrophotometry of hydrogen peroxide nitrogen spectrophotometry hydrogen peroxide spectrophotometry Water Quality Determination of Nitrate Nitrogen Spectrophotometry Analysis method of water quality nitrate nitrogen Nitrobenzene Spectrophotometry Determination method of nitrate nitrogen Determination method of nitrate nitrogen Water quality nitrite detection spectrophotometric nitrate nitrogen Nitric acid 160 degrees Protein Determination Spectrophotometry Photometric method for water quality detection Nitrate determination spectrophotometric method Nitrite test method How about nitrite in sewage Nitrate Nitrogen Molecular Chain "Determination of Nitrate Nitrogen in Water Quality by Ultraviolet Spectrophotometry" Nitrite in sewage sewage nitrite Determination of Nitrate by Ultraviolet Spectrophotometry seawater nitrate nitrogen Water quality nitrate detection Determination of nitrogen oxides, spectrophotometric method Nitrate nitrogen measurement method How to measure water quality inorganic nitrogen Nitrate nitrogen nitrate Nitrate nitrogen and nitrite nitrogen Nitrite soil Nitrite Nitrogen Detection Spectrophotometric detection of total nitrogen Determination of Nitrate Nitrogen Content--Ultraviolet Spectrophotometry Nitrite detection and analysis method Spectrophotometric Determination of Light Carbon Determination of water quality nitrate nitrogen Determination of salinity in water Water quality nitrate detection spectrophotometry + nitrogen Spectrophotometric detection of nitrate nitrogen photometric nitrate nitrogen nitric acid nitrogen Water Quality Determination of Nitrate Nitrogen by Ultraviolet Spectrophotometry Water Quality Total Nitrogen Spectrophotometry Determination of tin in water spectrophotometric method Ultraviolet Spectrophotometric Determination Method of Total Nitrogen in Water How to measure nitrate nitrogen How to measure nitrite Spectroscopic determination method of total nitrogen Water quality spectrophotometer bottled water nitrite Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen Spectrophotometric determination of nitrate nitrogen "Nitrite Spectrophotometric Nitrate spectrophotometer water quality Water Quality Determination of Nitrate Nitrogen by Ultraviolet Spectrophotometry Determination of Nitrate Nitrogen Spectrophotometric Method Determination method of total nitrogen by spectrophotometry Nitrate determination spectrophotometric total nitrogen spectrophotometry What method is used for the determination of nitrate nitrogen in water? Other nitrate nitrogen determination methods Nitrate Nitrogen Determination Determination of Nitrate Nitrogen in Water by Ultraviolet Spectrophotometry Test for Nitrite at Home Nitrite detection method Nitrate Nitrogen Determination Spectral nitrate Nitrate + Nitrogen Determination of nitrate nitrogen Water Quality Sulfate Luminosity Water Quality Total Nitrogen Spectrophotometry Determination of Nitrate Nitrogen in Water Quality by Ultraviolet Spectrophotometry Determination of Nitrate Nitrogen in Water by Ultraviolet Spectrophotometry Nitrate nitrogen measurement method Color of nitrite determination nitrate nitrogen Water quality Nitrate nitrogen Total nitrogen water quality spectrophotometry Determination method of nitrite nitrogen GBT7493 GB/T 7493-1987 Determination of Nitrate Content by Spectrophotometry Determination of nitrite nitrogen in water Determination method of nitrite nitrogen Water Quality Spectrophotometry Water quality Nitrate Determination of nitrate nitrogen in water using thymol spectrophotometry Water quality nitrate nitrogen detection Water quality nitrite detection method Nitrate nitrogen standard curve in water Determination of nitrate nitrogen in water using ultraviolet absorption spectrometry Nitrate curve calibration What spectrophotometer is used to detect nitrite? Precautions for measuring phosphate by spectrophotometry Color developer for water nitrate nitrogen Determination of total nitrogen in water using UV spectrophotometry saline media slide method What is the national standard for the determination of nitrite nitrogen in water? Briefly describe the methods and principles for the determination of ammonia nitrogen, nitrite nitrogen, and nitrate nitrogen in water samples. Nitrate nitrogen test method Sulfamic acid method Nitrate detection method for purified water Pharmacopoeia testing method for nitrite determination using spectrophotometry Nitrate nitrogen surface water discharge The latest detection method of nitrite nitrogen in sewage Nitrate nitrogen water quality Method for determination of nitrite in water Lake water nitrate nitrogen Method for determination of nitrite concentration Treatment methods for nitrous acid mutagenesis Spectrophotometric Trinitrogen Test Method Spectrophotometric nitrate nitrogen test method Water quality nitrate nitrogen standard curve Nitrite nitrogen determination method Nitrite nitrogen determination method Determination method of nitrite nitrogen in water Detection method for nitrite nitrogen in drinking water Test method for water nitrite Method for measuring nitrate nitrogen in water quality using ultraviolet photometry Manual determination method of nitrate in groundwater Fluorescence method for measuring nitrite Water quality standard nitrate nitrogen Water quality testing standards nitrate nitrogen nitrate nitrogen Detection of salinity in water Nitrate ion spectrophotometer determination method Method for determination of related substances of azelastine hydrochloride Determination method of ammonia nitrogen in water Spectrophotometry Method for determination of nitrate nitrogen in water Water quality nitrite nitrogen determination Nitrite water quality Water quality total nitrogen detection spectrophotometry water salinity Hach water quality nitrate determination method Nitrite nitrogen in water Phosphate detection method spectrophotometry Water quality nitrite nitrogen standard curve Water quality nitrate nitrogen detection method Nitrite nitrogen surface water Spectrophotometric method for measuring total nitrogen Determination of sulfate by spectrophotometry Water quality nitrite determination method Method for determination of nitrate nitrogen in sewage Determination method and principle of nitrite Seawater nitrate nitrogen standard curve purified water nitrite Photometric detection method for nitrilotriacetic acid content Water quality nitrite detection national standard number Method for measuring absorbance under nitrogen conditions Method for determination of total nitrogen in water samples Nitro nitrogen and nitrite nitrogen in water Quality control method for determination of salinity in water Nitrite nitrogen standard curve Method for determination of salinity in water Nitrite nitrogen absorbance standard curve National standard determination method for nitrate nitrogen in water quality Surface water nitrite nitrogen Water quality nitrogen and phosphorus determination Water quality nitrate nitrogen determination Nitrite nitrogen determination method Determination method of nitrate nitrogen hydrochloride sulfamic acid Water quality nitrate analysis Nitrite method Nitrite nitrogen standard curve Nitrite nitrogen method UV spectrophotometry Water quality nitrite Water quality testing for nitrite Nitrite nitrogen detection method Drinking water nitrate-nitrogen Nitrite quantitative detection method What are the methods for testing chlorite in water quality? National standard determination method of nitrite nitrogen Nitrite Nitrogen in Water International water quality chlorite Spectrophotometric Theanine Standard Curve National standard detection method for nitrite nitrogen Nitrite nitrogen determination method Seawater nitrite nitrogen standard curve Nitrite fluorescence detection method Determination method of nitrate nitrogen in water gb/t 7493-4987 Nitrite nitrogen determination method Nitrate nitrogen determination method Sulfamic acid Method for measuring nitrate nitrogen using salicylic acid Nitrite standard curve Test method for nitrite and ammonia nitrogen content Determination method of nitrate nitrogen in water quality Nitrobenzene spectrophotometry in water Monitoring Methods of Nitrate Nitrogen in Seawater Water quality-Determination method of nitrate nitrogen Determination of nitrogen in water quality Nitrate nitrogen test Water quality nitrate nitrogen determination method Nitrite treatment method Standard curve for determination of nitrite nitrogen Determination of nitrogen in water quality

《GB/T 7493-1987水质亚硝酸盐氮的测定分光光度法》由467（生态环境部）归口，主管部门为生态环境部。

Scope

This standard specifies the method for the determination of nitrite nitrogen in drinking water, groundwater, surface water and wastewater by spectrophotometry. Determination upper limit When the test portion takes the largest volume (50m1), the method can be used to determine the concentration of nitrite nitrogen up to 0.20mg/L. The minimum detection concentration uses a cuvette with an optical path length of 10mm, and the sample volume is 50ml. The concentration corresponding to the absorbance of 0.01 unit is the minimum detection limit concentration, which is 0.003mg/L.

More samples: YD/T 3934-2021 NB/T 47013.2-2015 GB 50021-2001(2009)

Sample only — not a preview of GB/T 7493-1987

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