STN 72 2041-17
Name: | STN 72 2041-17 |
Validity: | Valid |
Number of pages: | 4 |
Language: |
CS
|
Paper: | 2,80€ |
Electronic version |
a) Only read (without ability to print and copy)
2,52€ b) Without ability to print, with ability to copy (printscreen) 2,80€ c) With ability to print and copy (printscreen) 3,64€ |
Slovak title | Chemický rozbor oceliarskej trosky. Časť 17: Stanovenie oxidu chromitého |
English title | Chemical analysis of steel-making slag. Determination of chromium (III) oxide content |
Release Date: | 01. 08. 1992 |
Date of withdrawal: | |
ICS: | 71.040.40, 91.100.15, 91.100.20 |
Sorting character/National clasification code | 72 2041 |
Level of incorporation: | |
Official Journal | 08/92 |
Amendments | |
Replaced by: | |
Repleces: | |
Note in Official Journal: | |
Subject of the standard: | Tato norma urcuje metodu atomove absorpcni spektrometrie pro stanoveni oxidu chromiteho. Po rozpusteni vzorku v kyseline fluorovodikove a stineni fluoridu pridavkem kyseliny borite se odfiltruje nerozpusteny zbytek a rozlozi se dotavenim s metaboritanem lithnym. Vyluh taveniny se pripoji k puvodnimu filtratu a spojene roztoky se doplni na predepsany objem. Z takto ziskaneho zasobniku roztoku se odebere vhodny alikvotni podil a po pridani roztoku vapniku jako ionizacniho pufru a prislusnem zredeni se meri atomova absorpce chromu v plameni acetylen-vzduch pri vlnove delce 357,9 nm. |