The content of diosgenine in some species of dioscorea branch is determined by gas chromatography. This method is convenient and high confidence. Some species contain substantial diosgenine for production. This method can be applied for controlling the material in production.
Pharmaceutical Preparations ; Chromatography, Gas

Chromatography, Gas ; Humans

Acetates ; urine ; Chromatography, Gas ; Gas Chromatography-Mass Spectrometry ; Humans

Diosgennin has been analyzed by gas chromatography with glass column that was silanated at high temperature. The method has got less than 3 per-cents of error. This method was introduced in practical production of pharmaceutical industry.
Chromatography, Gas ; Diosgenin ; Pharmaceutical Preparations

Air ; Chromatography, Gas ; Solvents ; Workplace

Acetamides ; blood ; Chromatography, Gas ; Humans

Chromatography, Gas ; methods ; Triazoles ; blood

No abstract available.
Diagnosis ; Gas Chromatography-Mass Spectrometry

Aims: The utilisation of lignocellulosic biomass for bioethanol production reduces the dependency on fossil fuels as a source of energy and emission of greenhouse gas (GHG). However, studies in this emerging field are hampered by the cost of ethanol quantification methods. Due to the volatile nature of ethanol, the method for the quantification of bioethanol production should be reproducible and rapid to avoid any evaporation loss to the surroundings. Therefore, this study aimed to develop a simple, rapid and precise bioethanol quantification method using a gas chromatographyflame ionisation detector (GC-FID) without having to go through distillation process for ethanol purification. Methodology and results: The bioethanol was produced via consolidated bioprocessing (CBP) using Trichoderma asperellum B1581 and paddy straw. The peak corresponding to ethanol was obtained at 2.347 min with a peak area of 189.66, equating to 0.159% (v/v) or 1.25 g/L ethanol. A comparison between the quantity of ethanol detected by GC-FID and spectrophotometric analysis (340 nm) showed no significant difference (p>0.05) in the amount of ethanol detected by GC analysis, thus validating the accuracy of the GC method. Conclusion, significance and impact of study This work presents a simple, precise and reliable method to determine the amount of bioethanol in the sample using a GC-FID. Currently, there are many GC-FID methods available for the determination of ethanol/alcohol in a human blood samples or in beverages but not in bioethanol samples. Thus, this method was developed to facilitate the determination of bioethanol in the samples produced from lignocellulosic materials.
Chromatography, Gas ; Flame Ionization ; Ethanol

Recently, we performed an ezperi nlent to detect residual ethylene oxide(EO) gas and methylmethacrylate(MMA) monomer in the intraocular lenses from eleven different makers using gas-liquid chromatography. The residual EO gas over 25ppm was seen in 2 makers and also the MMA monomer over 2% was present in two makers. As a result, we recommend that the precise product quality-control of the IOLes is necessary especially for the lenses from foreign manufacturers.
Chromatography, Gas ; Ethylene Oxide* ; Lenses, Intraocular