GB/T 32251-2024 Investment casting process—Pollutants control

GB/T 32251-2015 Investment casting process—Pollutants control

GB 8978 GB 39726 GBZ/T 189.4 GBZ/T 189.8 GB/T 5611-1998 Foundry terminology GB/T 5611-2017 Foundry terminology GB/T 7466-1987 Water quality—Determination of total chromium GB/T 7467-1987 Water quality—Determination of chromium (Ⅵ)—1,5 Diphenylcarbohydrazide spectrophotometric method GB/T 7475-1987 Water quality—Determination of copper, zinc, lead and cadmium—Atomic absorption spectrometry GB/T 11893-1989 Water quality—Determination of total phosphorus— Ammonium molybdate spectrophotometric method GB/T 11901-1989 Water quality—Determination of suspended substance—Gravimetric method GB/T 11911-1989 Water quality—Determination of irom and manganese—Flame atomic absorption spectrometric method GB/T 11912-1989 Water quality—Determination of nickel—Flame atomic absorption spectrometric method GB 12348-1990 Standard of noise at boundary of industrial enterprises GB/T 15432-1995 Ambient air—Determination of total suspended particulates—Gravimetric method HJ 38-2017 HJ 38-2017 Determination of Total Hydrocarbon, Methane and Non-Methane Hydrocarbons in Gaseous Pollutants from Fixed Source by Gas Chromatography HJ/T 38-1999 Determination of non-methane volatile organic compounds in fixed pollutant sources: gas chromatography method HJ/T 55-2000 Non-Organized Emissions Monitoring Technical Guidelines for Atmospheric Pollutants HJ/T 56-2000 The determination of sulfur dioxide in fixed pollution sources using iodometric method HJ/T 92-2002 Total discharge of pollutants monitoring technical specifications HJ 485-2009 Water quality determination of copper: Cresolphthalein disodium diethylthiourea spectrophotometric method HJ 535-2009 Water quality determination of ammonia nitrogen using Nessler's reagent spectrophotometry HJ 537-2009 Determination of Ammonia Nitrogen in Water - Distillation-Neutralization Titration MethodHJ 537-2009 Water Quality HJ 549-2009 HJ 549-2009 Determination of Hydrogen Chloride in Ambient Air and Fumes by Ion Chromatography (Interim) HJ 549-2016 Determination of Hydrogen Chloride in Ambient Air and Waste Gas by Ion Chromatography. Translation: The method for the determination of hydrogen chloride in ambient air and waste gas by ion chromatography HJ 601-2011 Water quality determination of formaldehyde: Acetyl acetonate spectrophotometry HJ 604-2011 The determination of total hydrocarbons in ambient air by gas chromatography HJ 604-2017 The determination of total hydrocarbons, methane, and total non-methane hydrocarbons in ambient air by direct injection-gas chromatography method HJ 629-2011 Non-dispersive infrared absorption method for the determination of sulfur dioxide in fixed pollution sources HJ 636-2012 Water quality determination of total nitrogen by alkaline potassium persulfate digestion and UV spectrophotometry HJ 637-2012 Water quality determination of oil and animal/vegetable fats by infrared spectrophotometry HJ 637-2018 Water quality determination of oil and animal/vegetable fats by infrared spectrophotometry HJ 692-2014 The determination of nitrogen oxides from fixed pollutant sources using non-dispersive infrared absorption method HJ 693-2014 The determination of nitrogen oxides in fixed pollution sources using potentiometric electrolysis method HJ 828-2017 Water quality: Determination of Chemical Oxygen Demand using Dichromate Method HJ 836-2017 The determination of low-concentration particulate matter from fixed pollution sources using weight method GB/T 16157-1996 Determination of particulates and sampling methods of gaseous pollutants emitted from exhaust gas of stationary source