Determination of Free Phenol in Polyoxyethylene Phenyl Ethers

1955 ◽  
Vol 27 (11) ◽  
pp. 1836-1838 ◽  
Author(s):  
C. F. Smullin ◽  
F. P. Wetterau
Keyword(s):  
Free Phenol ◽  
Phenyl Ethers

Determination of biogenic halogenated methyl-phenyl ethers (halogenated anisoles) in the picogram m -3 range in air

1996 ◽  
Vol 354 (3) ◽  
pp. 333-343
Author(s):  
Ursula F�hrer ◽  
Angela Dei�ler ◽  
K. Ballschmiter
Keyword(s):  
Phenyl Ethers ◽  
Methyl Phenyl

DETERMINATION OF FREE PHENOL IN PHENOL RESOLE RESIN BY GEL PERMEATION CHROMATOGRAPHY

1973 ◽  
Vol 2 (3) ◽  
pp. 275-278 ◽  
Author(s):  
Morio Tsuge ◽  
Tatsuya Miyabayashi ◽  
Shigeyuki Tanaka
Keyword(s):  
Gel Permeation Chromatography ◽  
Free Phenol ◽  
Gel Permeation

Thin Layer Chromatographic Detection and Indirect Gas Chromatographic Determination of Three Carbamate Pesticides

1975 ◽  
Vol 58 (5) ◽  
pp. 1015-1019
Author(s):  
George F Ernst ◽  
Saskia J Röder ◽  
Gwan H Tjan ◽  
John T A Jansen
Keyword(s):  
Methylene Chloride ◽  
Chromatographic Determination ◽  
Carbamate Pesticides ◽  
Chromatographic Detection ◽  
Vegetables And Fruits ◽  
Phenyl Ethers ◽  
Ppm Level ◽  
Inhibition Technique ◽  
Carbamate Pesticide

Abstract Carbamate pesticide residues are extracted from vegetables and fruits with methylene chloride. The extracts are spotted on silica gel plates and the pesticides are detected by an enzymatic inhibition technique. For quantitative determination, aliquots of the methylene chloride extracts are evaporated to dryness in a rotary evaporator. After the residues are dissolved in ethanol, 0.5N NaOH is added in the hydrolysis step. To remove a number of possible interferences the hydrolyzed phenols are steamdistilled and treated with l-fluoro-2, t-dinitrobenzene and/or 4-chloro-α,α,α-trifluoro-3,5-dinitrotoluene to form the ether derivatives. Efficiency in the conversion of the phenolic moieties to the phenyl ethers is about 100%. The resulting electron-capturing derivatives enable the carbamate pesticides to be detected in vegetables and fruits at the 0.05 ppm level. Recoveries of 90–94% were obtained from vegetables and fruits fortified with 0.5–2.0 ppm carbaryl, Mesurol, and propoxur.

Infrared Determination of Free Phenol in Phenol-Formaldehyde Resins

1952 ◽  
Vol 24 (3) ◽  
pp. 497-498 ◽  
Author(s):  
J. J. Smith ◽  
F. M. Rugg ◽  
H. M. Bowman
Keyword(s):  
Phenol Formaldehyde ◽  
Free Phenol

scholarly journals Chromatographic Techniques for the Determination of Free Phenol in Foundry Resins

2011 ◽  
Vol 44 (8) ◽  
pp. 1536-1543 ◽  
Author(s):  
Maria Teresa Oliva-Teles ◽  
Cristina Delerue-Matos ◽  
Henri P. A. Nouws ◽  
M. C. M. Alvim-Ferraz
Keyword(s):  
Free Phenol ◽  
Chromatographic Techniques
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