GB 5009.42-2016: Translated English of Chinese Standard. GB 5009.42-2016: National Food Safety Standard - Determination of Table Salt Index
https://www.chinesestandard.net, 2019 M06 18 - 22 pages
This Standard specifies the testing methods of sodium chloride, lead, total arsenic, cadmium, total mercury, barium, potassium chloride, potassium ferrocyanide, and iodine in table salt. This Standard applies to the determination of table salt index.
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Determination of lead
Determination of total arsenic
Determination of potassium chloride
Determination of potassium ferrocyanide ferrous sulfate method
Determination of iodine redox titration method
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100 mL beaker 500 mL volumetric according to formula acid disodium magnesium ADD 2 mL ADD water analysis results analytically pure arithmetic mean barium chloride Bromothymol blue buffer solution calculated according calculation result chloride ion chrome black content of potassium dilute to 100 EDTA standard titration ethylenediaminetetraacetic acid disodium Expression of analysis ferrous sulfate filter Flame emission spectroscopy g accurate Grade 3 water grams g Instruments and equipment method are analytically milliliters mL mL of sodium mL of water mL volumetric flask nitrate standard titration obtained under repeated Operate according PIPETTE potassium chloride potassium chromate potassium ferrocyanide Preparation of reagents result is retained sample is calculated Sample mass sample solution sand core funnel sensitivity is 0.001 silver nitrate standard sodium chloride Sodium diethyldithiocarbamate sodium hydroxide specified in GB/T spectrometry in GB standard solution standard titration solution standard use solution sulfate radical Sulfuric acid water specified water to dilute water to dissolve