STN ISO 5438
| Name: | STN ISO 5438 |
| Validity: | Withdrawn |
| Number of pages: | 8 |
| Language: |
CS
|
| Paper: | 9,70€ |
| Electronic version |
a) Only read (without ability to print and copy)
8,73€ b) Without ability to print, with ability to copy (printscreen) 9,70€ c) With ability to print and copy (printscreen) 12,61€ |
| Slovak title | Kazivec na výrobu kyseliny fluorovodíkovej a na keramické účely. Stanovenie oxidu kremičitého. Molybdátokremičitanová spektrofotometrická metóda |
| English title | Acid-grade and ceramic-grade fluorspar. Determination of silica content. Reduced molybdosilicate spectrometric method |
| Release Date: | 01. 12. 1992 |
| Date of withdrawal: | 01. 08. 2022 |
| ICS: | 71.040.50, 73.080 |
| Sorting character/National clasification code | 72 1940 |
| Level of incorporation: | obs ISO 5438:1985 |
| Official Journal | 12/92 |
| Amendments | |
| Replaced by: | |
| Repleces: | |
| Note in Official Journal: | |
| Subject of the standard: | Tato mezinarodni norma urcuje molybdatokremicitanovou spektrofotometrickou metodu pro stanoveni obsahu oxidu kremiciteho v kazivci pro vyrobu kyseliny fluorovodikove a pro keramicke ucely. Metoda je vhodna pro kazivce s obsahem oxidu kremiciteho vyjadrenym jako SiO2 v rozsahu 0,05 procenta az 4,0 procenta (m/m). |