GB/T 31414-2015Water based coatings—Determination of surfactant—Alkylphenol polyethoxylates (English PDF)

3.1 Alkylphenol (AP)

The molecular structure of the alkylphenol R-C6H4-OH. This type of common substances are octyl phenol (C8H17-C6H4-OH, abbreviated OP) and azelaic

Phenol (C9H19-C6H4-OH, referred to as NP).

3.2 Alkyl phenol ethoxylates (APEO)

The molecular structure of alkylphenol ether is R-C6H4- (OC2H4) nOH; n = 2 ~ 16,17 ~ 34,35 ~ 45. The substances

Common are octyl phenol ethoxylates [C8H17-C6H4- (OC2H4) nOH, referred OPnEO] and nonylphenol ether [C9H19-

C6H4- (OC2H4) nOH, referred NPnEO].

NOTE. alkyl phenol ethoxylates as waterborne coatings surfactant. Alkylphenols are degradation products of alkylphenol ethoxylates.

Principle 4

Methanol and water as the extraction solvent, centrifugal separation and Soxhlet extraction method of combining the extracted sample APEO, the extract was concentrated

After the treatment, the use of high performance liquid chromatography or precision to meet current and effective methods (such as. liquid chromatography - mass spectrometry, liquid chromatography - tandem mass spectrometry

Etc.) were detected. The average adduct number ethoxylates APEO determine and reversed-phase liquid chromatography to determine the APEO using normal phase liquid chromatography

Determination of content combining external standard.

Note. The extraction of the sample may also be used to select another APEO confirmed a considerable recovery of extraction methods, such as high-speed centrifugation, ultrasonic extraction.