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ISO 787-4:1981

General methods of test for pigments and extenders — Part 4: Determination of acidity or alkalinity of the aqueous extract
1. 9. 1981.

Опште информације

90.93     3. 9. 2024.

ISO

ISO/TC 256

Međunarodni standard

87.060.10  

francuski   engleski  

Kupovina

Objavljen

Jezik na kome želite da primite dokument.

Apstrakt

The principle of the method consists in the hot extraction of the material by following the procedure specified in ISO 787/3, to the stage of obtaining a perfectly clear filtrate. The determination is carried out with indicator solution (method A). If the solution with the methyl red indicator is yellow (alkaline), titrate it with the hydrochloric acid solution to an orange end-point; if the solution with the methyl red indicator is red (acid), titrate it with the sodium or potassium hydroxide solution to an orange end-point. The other method (method B) is the potentiometric determination. Take 100 ml of the test solution, insert the electrodes of the pH measuring device and read the pH value.

Životni ciklus

TRENUTNO

OBJAVLJEN
ISO 787-4:1981
90.93 Odluka o potvrđivanju standarda
3. 9. 2024.

Nacionalna preuzimanja

SRPS H.C8.204:1989  
ISS

Pigmenti i punila - Određivanje kiselosti ili alkalnosti vodenog ekstrakta - Volumetrijska metoda

95.99   Povučen

H035 Saznaj više

SRPS EN ISO 787-4:2017  
ISS

Opšte metode za ispitivanje pigmenata i punilaca – Deo 4: Određivanje kiselosti ili baznosti vodenog ekstrakta

60.60   Standard objavljen

H035 Saznaj više