GB 5413.22-2010 PDF EnglishUS$70.00 · In stock · Download in 9 seconds
GB 5413.22-2010: National food safety standard -- Determination of phosphorus in foods for infants and young children, milk and milk products Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Obsolete GB 5413.22: Historical versions
Similar standardsGB 5413.22-2010: National food safety standard -- Determination of phosphorus in foods for infants and young children, milk and milk products---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB5413.22-2010 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA National food safety standard Determination of phosphorus in foods for infants and young children, milk and milk products Issued on: MARCH 26, 2010 Implemented on: JUNE 1, 2010 Issued by. Ministry of Health of the People's Republic of China Table of ContentsPreface ... 3 1 Scope ... 4 2 Normative references ... 4 3 Principle ... 4 4 Reagents and materials ... 4 5 Instruments and apparatuses ... 5 6 Analytical procedure ... 5 7 Expression of analytical results ... 6 8 Precision ... 6 9 Others ... 6 Preface This standard replaces GB/T 5413.22-1997 “Determination of phosphorus in formula and milk powder for infants and young children”. Compared with GB 5413.22-1997, the main changes in this standard are as follows. — The digestion of 3-type of strong acids “nitric acid - sulphuric acid - perchloric acid” is changed into the digestion of “nitric acid - perchloric acid”. The previous editions replaced by this standard are as follows. — GB 5413-1985, GB/T 5413.22-1997. National food safety standard Determination of phosphorus in foods for infants and young children, milk and milk products1 ScopeThis standard specifies the method for the determination of phosphorus in foods and dairy products for infants and young children. This standard applies to the determination of phosphorus in foods and dairy products for infants and young children.2 Normative referencesThe reference document in this standard is essential to the application of this standard. For dated reference documents, only the dated versions apply to this standard. For undated reference documents, the latest versions (including all amendments) apply to this standard.3 PrincipleSamples are subjected to acid oxidation, to make phosphorus react with vanadium- ammonium molybdate and form yellow complex compound in nitric acid solution. Use spectrophotometer to determine the absorbance at the wavelength of 440 nm. The color depth is proportional to the content of phosphorus.4 Reagents and materialsUnless specified, all reagents used in this method are analytical reagents. Water is the Grade 3 water specified by GB/T6682. 4.1 Nitric acid. Guaranteed reagent. 4.2 Perchlorate. Guaranteed reagent. 4.3 Ammonium molybdate [(NH4)6Mo7O24·4H2O]. 4.4 Metavanadate (NH4VO3). 4.5 Sodium hydrate (NaOH). 4.6 Standard solution of potassium dihydrogen phosphate (KH2PO4). 4.7 2,6-dinitrophenol or 2,4-dinitrophenol [C6H3OH (NO2)2]. 4.8 Sulphuric acid. Guaranteed reagent. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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