Determination of Phenols in Waste Waters by Ultraviolet Absorption

Abstract

A spectrophotometric method based on the shift with pH of the ultraviolet spectra of phenols has been developed for the determination of phenols in refinery waste waters.An extraction of the water sample at pH 12 with carbon tetrachloride, to remove oil, is followed by a tributyl phosphate extraction of the oil-free sample adjusted to pH 5, to recover the phenols as a concentrate.

Optimization of Germination Inhibitors Elimination from Sugar Beet (Beta vulgaris L.) Seeds of Different Maturity Classes

“…Infrared or ultraviolet absorption-based methods appear to be a dependable approach for studying phenols [24]. Quantifying these compounds by UV-visible spectroscopy was found to be a reliable technique [16,17,39], and the absorption range of 230-300 nm was reported in literature as characteristic of these aromatic compounds [16,17].…”

“…Some phenolic compounds are intermediates in lignin biosynthesis, which happens in the perianth lignification process [3]. These compounds can be investigated by different methods, including HPLC, LC-MS, ultraviolet absorption [22,24]. Analyzing the UV-visible absorbance spectrum of beet seed steeping solutions is a reliable way to detect differences among different groups of seeds [17].…”

The Identification and Estimation of Phenolic Fungicides in Mildewproof Materials

“…Because of the comparatively strong ultraviolet absorption spectra of most phehotic fungicides, it seemed likelv that this method of analysis might he used. Some work on the ultraviolet absorption technique has already heen reported 17, 9), but these papers concern quantitative methods based on the hathochromic shift to longer wavelengths exhibited hv ionized phenols, Since the phencclic compound has not been identihed, the quantitative data must be based upon an average absorptivity. 1(!etltificat~)ii as well as estimation of the lhenml can be accomplished by the present method.…”

Concentration and determination of trace organic pollutants in water

“…Other techniques which have been used for total phenolic analysis included ultraviolet absorption spectrometry (19,20,21,22), infrared-absorption spectroscopy (23,24) and electro chemical techniques (25,26) . However these methods do not exhibit the high sensitivity required for the analysis of traces of phenolic compounds.…”