Test Methods for Low Concentrations of Diethlyene Glycol in Ethylene Glycol by Gas Chromatography

2003 ◽  
Author(s):  
Keyword(s):  
Gas Chromatography ◽  
Ethylene Glycol ◽  
Test Methods ◽  
Low Concentrations

2,3-Butanediol in plasma from an alcoholic mistakenly identified as ethylene glycol by gas-chromatographic analysis

1991 ◽  
Vol 37 (8) ◽  
pp. 1453-1455 ◽  
Author(s):  
A W Jones ◽  
L Nilsson ◽  
S A Gladh ◽  
K Karlsson ◽  
J Beck-Friis
Keyword(s):  
Gas Chromatography ◽  
Ethylene Glycol ◽  
Chromatographic Analysis ◽  
Enzymatic Production ◽  
Low Concentrations ◽  
Elimination Half ◽  
Ethylene Glycol Poisoning ◽  
Incorrect Diagnosis ◽  
High Concentrations ◽  
Derivatives Of

Abstract 2,3-Butanediol was mistakenly identified as ethylene glycol in plasma specimens from two alcoholic patients. The cyclic phenylboronate ester derivatives of 2,3-butanediol and ethylene glycol had the same retention time when OV-17 was used as the stationary phase for gas chromatography. This led to incorrect diagnosis of ethylene glycol poisoning and unnecessary invasive therapy. Plasma from two chronic alcoholics contained 2,3-butanediol at 3.5 and 3.4 mmol/L. The elimination half-life of 2,3-butanediol was 3.9 days when ethanol was administered during therapy for suspected ethylene glycol poisoning. Low concentrations of 2,3-butanediol might be present in blood of chronic alcoholics as a result of a novel pathway of intermediary metabolism associated with some forms of alcoholism. However, a more likely explanation for fairly high concentrations of 2,3-butanediol is enzymatic production from 2-butanone. This ketone occurs in denatured alcohol preparations often consumed by alcoholics in Sweden.

Determination of purity and impurities of ethylene glycol for industrial use by gas chromatography

2019 ◽  
Vol 37 (1) ◽  
pp. 116
Author(s):  
Chenliang FAN ◽  
Yuhong ZHANG ◽  
Chuan WANG ◽  
Zhenlei PENG ◽  
Zhirong GAO
Keyword(s):  
Gas Chromatography ◽  
Ethylene Glycol ◽  
Industrial Use

Relative Volatilities of Ester and Amine Forms of 2,4-D

Weed Science ◽  
1976 ◽  
Vol 24 (1) ◽  
pp. 26-28 ◽  
Author(s):  
R. Grover
Keyword(s):  
Gas Chromatography ◽  
Acetic Acid ◽  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Flow Rate ◽  
Flow System ◽  
Butyl Ether ◽  
Technical Grade ◽  
Dichlorophenoxy Acetic Acid ◽  
Amine Salts

The relative volatilities of various technical and formulated ester and amine salts of 2,4-D [(2,4-dichlorophenoxy)acetic acid] were determined in a closed air-flow system consisting of a volatilization chamber and an ethylene glycol trap. The system was operated at a flow rate of 28.8 L/hr and a temperature of 30 C. Trapped herbicide vapor was analyzed by gas chromatography. The relative volatilities of technical gradeiso-propyl, butyl, propylene glycol butyl ether, andiso-octyl esters, were 56, 25 to 38, 4, and 1, respectively. The relative volatilities of various formulated esters and amines were of the magnitude of 440:33:1 for the high volatile, low volatile, and amine salts, respectively.

Development, validation, and application of a single-tube radioimmunoassay for cholic and chenodeoxycholic conjugated bile acids in human serum.

1977 ◽  
Vol 23 (11) ◽  
pp. 2107-2113 ◽  
Author(s):  
A Roda ◽  
E Roda ◽  
R Aldini ◽  
D Festi ◽  
G Mazzella ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Liver Disease ◽  
Bile Acid ◽  
Human Serum ◽  
Chenodeoxycholic Acid ◽  
Serum Samples ◽  
Single Tube ◽  
Glycocholic Acid ◽  
Low Concentrations ◽  
Conjugated Bile Acids

Abstract A single-tube radioimmunoassay for both cholic acid and chenodeoxycholic acid conjugates in serum is based on the use of [1-(14)C]glycocholic acid and [H-3H]glycochenodeoxycholic acid as tracers. The assay was shown to be specific, sensitive, accurate, and precise (CV = 13% at low concentrations, 5.5% at higher concentrations) when used for serum samples from subjects and patients with increased bile acid in the serum because of liver disease, and results correlate well with those by gas chromatography (r = .99).

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