Multi-part Document
BS 4427 - Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use

This is a multi-part document divided into the following parts:

• Part 1 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Determination of matter insoluble in water in sodium tripolyphosphate
• Part 2 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Measurement of pH value of sodium tripolyphosphate
• Part 3 Methods of test for sodium tripolyphosphate (<i>penta</i>sodium triphosphate) and sodium pyrophosphate (<i>tetra</i>sodium pyrophosphate). Determination of iron content
• Part 4 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Determination of loss on ignition
• Part 5 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Determination of particle size distribution
• Part 6 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Estimation of pyrophosphate content of sodium pyrophosphate
• Part 7 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Estimation of tripolyphosphate (triphosphate) content of sodium tripolyphosphate
• Part 8 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Determination of orthophosphate content
• Part 9 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Determination of fluorine content
• Part 10 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Determination of total phosphorus (V) oxide content: quinoline phosphomolybdate gravimetric method
• Part 11 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial useSeparation by column chromatography and determination of the different phosphate forms
• Part 12 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Condensed phosphates for industrial use (including foodstuffs). Determination of arsenic content. Silver diethyldithiocarbamate photometric method
• Part 13 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Condensed phosphates for industrial use (including foodstuffs) - determination of calcium content - flame atomic absorption spectrometric method
• Part 14 Methods of test for sodium tripolyphosphate (<i>penta</i>sodium triphosphate) and sodium pyrophosphate (<i>tetra</i>sodium pyrophosphate) for industrial use. Condensed phosphates for industrial use (including foodstuffs) - determination of chloride content - potentiometric method
• Part 15 Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Condensed phosphates for industrial use (including foodstuffs) - determination of oxides of nitrogen content - 3,4-xylenol spectrophotometric method