GB/T 19281-2014 Analytic method for calcium carbonate

GB/T 19281-2003 Analytic method for calcium carbonate

GB/T 3049-2006 Chemical products for industrial use—General method for determination of iron content—1,10-Phenanthroline spectrophotometric method GB/T 4472-2011 Detemination of density and relative density for chemical products GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 12804-2011 Laboratory glassware—Graduated measuring cylinders GB/T 19587-2004 Determination of the specific surface area of solids by gas adsorption using the BET method GB/T 21058-2007 Inorganic chemicals for industrial use—General method for mercury content—Flameless atomic absorption spectrometric method GB/T 23769-2009 Inorganic chemical products—General method for the determination of pH values GB/T 23774-2009 Inorganic chemicas for industrial use—General method for the determination of whiteness HG/T 3696.1-2011 Inorganic chemical products for chemical analysis: Preparation of standard solutions, preparations, and products - Part 1: Preparation of standard titration solutions HG/T 3696.2-2011 Inorganic chemical products - Preparation of standard solutions, preparations and articles for chemical analysis - Part 2: Preparation of impurity standard solutions HG/T 3696.3-2011 Inorganic chemical products for chemical analysis - Preparation of standard solutions, preparations, and articles - Part 3: Preparation of preparations and articles HG/T 3696.1-2002 Preparation of standard titration solution for chemical analysis of inorganic chemical products HG/T 3696.2-2002 Preparation of Standard Solutions for the Chemical Analysis of Inorganic Chemical Products with Impurities HG/T 3696.3-2002 The preparation of preparations and products used for chemical analysis of inorganic chemical products