ISO 3196:1975 PDF
Original price was: $43.00.$33.54Current price is: $33.54.
Sodium hydroxide for industrial use — Determination of carbonates content — Titrimetric method
Applicable to products having contents, expressed as CO2 , of more than 0.01 % (m/m). Relates to a procduct containing neither sulphides nor chlorates or only sulphides or only chlorates. Preliminary test by boiling an acidified test sample in the presence of methyl orange and with a lead acetate paper strip in the vapour. The sulphides blacken the paper and chlorates delolourize the methyl orange. Products containing neither sulphides nor chlorates: liberation of carbon dioxide by acidification and heating. Entrainment in a flow of gas and absorption in an excess of barium hydroxide solution. Titration of the excess barium hydroxide solution with a standard volumetric hydrochloric acid solution in the presence of thymolphthalein as indicator.
| Edition | 1975 |
|---|---|
| Published Date | 1975 |
| Published By | International Standardization Organisation |
| Page Count | 4 |
