Results 311 to 320 of about 1,507,914 (357)
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SPE Eastern Regional Meeting, 1997
Abstract Acidizing has typically been one of the most popular techniques used for the removal of damage in gas storage wells. Acidizing is often useful for carbonates, but surveys have indicated that as many as 30% of the sandstone wells were adversely affected by the use of acids.
V.J. Yeager, C.E. Shuchart
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Abstract Acidizing has typically been one of the most popular techniques used for the removal of damage in gas storage wells. Acidizing is often useful for carbonates, but surveys have indicated that as many as 30% of the sandstone wells were adversely affected by the use of acids.
V.J. Yeager, C.E. Shuchart
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Gas chromatographic analysis of dialkylbarbituric acids
Journal of Chromatography A, 1976A variety of procedures for the derivatization of barbituric acids for gas-liquid chromatography (GLC) are described and a convenient procedure for n-alkylation of barbiturates is reported. The gas chromatographic behavior of derivatives(methyl, ethyl, propyl, butyl, pentyl and hexyl) is discussed on the basis of the retention index.
J F, Menez +4 more
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Gas Chromatographic Determination of Hydrazoic Acid
Journal of Chromatographic Science, 1976A gas chromatographic procedure was developed for the determination of hydrazoic acid. Two possible columns were evaluated. The limits of detectability were 1.5 ng, or approximately 0.05%, in aqueous solution (w/v) and 2 mg per liter in air.
J M, Zehner, R A, Simonaitis
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Gas chromatography of urinary aromatic acids
Analytical Biochemistry, 1962Abstract A method is described for the separation and identification of 29 aromatic acids by gas chromatography. Aromatic acids without phenolic groups are converted to their methyl esters by reaction with ethereal diazomethane and chromatographed on an 8% ethylene glycol adipate column at 170°C.
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Gas Chromatography of Amino Acid Derivatives
1970Extensive studies have been made in attempts to adapt the gas-liquid chromatography technique to amino acids analysis. Since the discovery of the gas-liquid chromatograph, the idea of using it for amino acids analysis has been enthusiastically expounded because of its great potential in providing a means by which qualitative and quantitative analysis ...
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