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ISO 4327:1979

Non-ionic surface active agents — Polyalkoxylated derivatives — Determination of hydroxyl value — Phthalic anhydride method
1. 12. 1979.

Опште информације

90.93     1. 11. 2024.

ISO

ISO/TC 91

Međunarodni standard

71.100.40  

francuski   engleski  

Kupovina

Objavljen

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Apstrakt

The hydroxyl groups are esterified by phthalic anhydride in pyridine solution. The excess of phthalic anhydride is hydrolyzed with water containing in the sodium hydroxide solution used for the neutralization. The acidity which appears during the esterification and of the phthalic acid formed during the hydrolysis is neutralized by sodium hydroxide solution in the presence of phenolphthalein as indicator. The hydroxyl value is calculated from the difference between the volumes of sodium hydroxide solution used for the titration of the blank and of the test solution.

Životni ciklus

TRENUTNO

OBJAVLJEN
ISO 4327:1979
90.93 Odluka o potvrđivanju standarda
1. 11. 2024.

Nacionalna preuzimanja

SRPS ISO 4327:1992  
ISS

Nejonske površinski aktivne materije - Polialkoksilovani derivati - Određivanje hidroksilnog broja - Metoda sa anhidridom ftalne kiseline (identičan sa ISO 4327:1979)

90.93   Odluka o potvrđivanju standarda

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