Accession Number:

AD0683159

Title:

QUANTITATIVE ANALYSIS OF p-PHTHALIC ACID BY INFRARED SPECTRUM,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Report Date:

1968-09-30

Pagination or Media Count:

11.0

Abstract:

A quantitative method is described for determining p-phthalic acid in synthetic resins, synthetic fibers, and plastifiers by infrared absorption spectrum. The apparatus used was a infrared spectrometer. Infrared absorption spectra of p- and o-phthalic acid in N, N-dimethyl formamide in varying concentrations from 5 mg to 25 mgml were spectrographed. Results showed that a p-phthalic acid absorption band peak occurred at 754cm, and o-phthalic acid peaks at 819 and 769cm. A linear relationship was shown when the value of log I0I relative intensity was plotted against corresponding concentration. Experimental results also showed that o-phthalic acid had some effect on p-phthalic acid determination that when the spectrum of an unknown sample was compared with the knowns containing both p- and o-phthalic acid.

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE