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| Название (рус.): | Триполифосфат натрия и пирофосфат натрия технические. Разделение в хроматографической колонке и определение различных форм фосфатов |
| Название (англ.): | Sodium tripolyphosphate and sodium pyrophosphate for industrial use; Separation by column chromatography and determination of the different phosphate forms |
| Описание (англ.): | The determination of orthophosphate is not possible if the content is lowerthan 0.1 % (m/m). Tetrametaphosphates and pentametaphosphates are not usually present in commercial products. Specifies the absorption of the phosphate anions on an anionic ion-exchange resin. Elution with potassium chloride solutions of increasing concentrations. Calculation of the P2 O5 content in the different eluate volumes by means of a conversion factor to the corresponding form. The annex gives a photometric method of analysis of eluates. The principle consists in formation of molybdatophosphate in a dilute sulphuric acid medium of eluate, reduction with ascorbic acid and photometric measurement of the reduced complex at a wavelength of about 650 nm. Typical ion-exchange columns are shown in figures. Cancels and replaces the first edition of ISO 3358/1976. |
| Дата регистрации: | 01.06.79 |
| Дата введения: | 01.05.79 |
| Дата отмены: | 30.05.02 |
| Код КГС: | Л19 |
| Код ОКСТУ: | 2148;2109 |
| Код ОКС(МКС): | 71.060.50 |
| Код ОКП: | 2148;2109 |
| Нормативные ссылки: | NBN T 03-300-1980, EQV*NF T20-488-1985, EQV*NP-1659-1980, EQV |
| Ключевые слова: | CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICALS COLUMN CHROMATOGRAPHIC ANALYSIS COLUMN CHROMATOGRAPHY DETERMINATION OF CONTENT ORTHOPHOSPHATES PHOSPHORUS OXIDES PYROPHOSPHATES SODIUM SODIUM PYROPHOSPHATES SODIUM TRIPOLYPHOSPHATES CHEMICAL ANALYSIS AND TESTIN |
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