scholarly journals Studi Penggunaan Katalis Tembaga Molybdenum Oksida Berpenyangga Silica (CuMoO3/SiO2) Untuk Oksidasi Metana Menjadi Methanol Dan Formaldehida

REAKTOR ◽  
2017 ◽  
Vol 8 (1) ◽  
pp. 37 ◽  
Author(s):  
H. Husin ◽  
Marwan Marwan
Keyword(s):  
Porapak Q

Studi penggunaan katalis tembaga molybdenum oksida berpenyangga silica (CuMoO3/SiO2) untuk oksidasi parsial metana menjadi methanol dan formaldehida telah dilakukan. Preparasi katalis dilakukan dengan metode impregnasi. Hasil identifikasi dengan XRD menunjukkan bahwa komponen katalis terdiri dari senyawa MoO3, Cu2Odan SiO2. Uji kinerja katalis dilangsungkan dalam reaktor pipa lurus berunggun tetap, beroperasi pada temperature 400, 450 dan 500 0C dan tekanan 1 atm. Produk reaksi dianalisis menggunakan gas kromatografi buatan Shimadzu dengan kolom mole sieve 5A dan porapak Q. Konversi metana tertinggi diperoleh 34,1% menggunakan katalis dengan rasio  Cu: Mo 1: 3, temperatur reaksi 400 0C. Perolehan methanol tertinggi 3,4 % dan perolehan formaldehida tertinggi 7,3%.Kata kunci : oksidasi parsial metana, katalis (CuMoO3/SiO2), impregnasi, methanol, formaldehida

scholarly journals A STUDY ON CARBON ISOTOPE OF CO2 AND CH4 IN WESTERN DIENG PLATEU BY GAS CHROMATOGRAPHY- ISOTOPE RATIO MASS SPECTROMETER (GC-IRMS)

2010 ◽  
Vol 5 (1) ◽  
pp. 11-14
Author(s):  
Hanik Humaida
Keyword(s):  
Gas Chromatography ◽  
Carbon Isotope ◽  
Mass Spectrometer ◽  
Isotope Ratio ◽  
Isotope Analysis ◽  
Ionization Detector ◽  
Volcanic Gas ◽  
Porapak Q ◽  
Flame Ionization ◽  
Isotope Ratio Mass Spectrometer

The carbon isotope can be used to evaluate volcanism phenomenon of volcano. The study of carbon isotope of CO2 and CH4 was carried out in western Dieng Plateau by mass-spectrometer. Before analysis, sampel was separated by gas chromatography using a Porapak-Q column and a FID (Flame Ionization Detector) detector. The gas was oxidized by copper oxide at 850oC before being ionized in mass-spectrometer for isotope analysis. The CO2 content in Candradimuka crater (-4.10 O/OO), indicated that the gas may be as volcanic gas. The other CO2 from Sumber and western Gua Jimat, had isotope value  of -10.05 and -12.07 O/OO, respectively, indicating contamination from crustal and subduction material. The carbon isotope of CH4 gas from Pancasan village was -63.42 O/OO, that may be categorized as biogenic gas.   Keywords: isotope, CO2, CH4, Dieng.

scholarly journals The Use of Cryogenic Temperature Gas Chromatography for the Determination of Carbon Monoxide and Carbon Dioxide in Cigarette Smoke

1972 ◽  
Vol 6 (4) ◽  
Author(s):  
G.P. Morie ◽  
C.H. Sloan
Keyword(s):  
Carbon Dioxide ◽  
Gas Chromatography ◽  
Carbon Monoxide ◽  
Liquid Nitrogen ◽  
Cigarette Smoke ◽  
Cryogenic Temperature ◽  
Chromatographic Method ◽  
Porapak Q ◽  
Gas Chromatographic Method

AbstractA gas chromatographic method for the determination of carbon monoxide and carbon dioxide in cigarette smoke was developed. A column containing Porapak Q packing and a cryogenic temperature programmer which employed liquid nitrogen to cool the column to subambient temperatures was used. The separation of N

scholarly journals Preparative-Capillary Gas Chromatographic Systems for Trace Analysis of Rum

1969 ◽  
Vol 60 (4) ◽  
pp. 559-584
Author(s):  
Heriberto Batiz ◽  
Elena Soltero
Keyword(s):  
Stainless Steel ◽  
Puerto Rican ◽  
Alcoholic Beverages ◽  
Complete Analysis ◽  
Volatile Fraction ◽  
Rapid Preparation ◽  
Porapak Q ◽  
The Third ◽  
System A ◽  
In Series

Three gas chromatographic systems a ppropriate for the reproducible rapid preparation and subsequent quantitative analysis of rum concentrates were developed and tested. The first and second systems employed preparative columns directly coupled to a capillary Golay column. Rum concentrates obtained in the preparative column were collected in a stainless steel trap of low dead space and simultaneously analyzed in the capillary system by flash heating of the trap. The third system used the same chromatographic equipment, with a 1/4-in o.d. trap to transfer an amount of concentrate to a 2-ml vial. These concentrates were subsequently analyzed with two Golay columns. In the first system, a 10-ft 20% Carbowax 20M packed preparative column coupled to a 150-ft Golay column through a 1/8-in o.d. trap gave excellent results in the analysis of the volatile fraction of rums. Ten congeners eluting before alcohol were detected in a commercial rum, six of which have not been identified. The second system, utilizing the 10-ft Carbowax 20M coupled to a 7-ft Porapak Q preparative column, was tested successfully with a 1/8-in o.d. trap. About 30 congeners were detected in the same commercial Puerto Rican rum. A 7-ft Porapak Q packed preparative column was investigated in the third system provided with a 1/4-in o.d. trap. About 40 congeners were detected in two commercial Puerto Rican rums utilizing a 50-ft SE-30 Golay column in series with a 150-ft Carbowax 20M Golay column. Results demonstrate the feasibility of obtaining a rapid and complete analysis of distilled alcoholic beverages.

Use of solid–liquid distribution coefficients to determine retention properties of Porapak-Q resins

2001 ◽  
Vol 931 (1-2) ◽  
pp. 31-39 ◽  
Author(s):  
Lina Ortega ◽  
Ricardo López ◽  
Juan Cacho ◽  
Vicente Ferreira
Keyword(s):  
Distribution Coefficients ◽  
Liquid Distribution ◽  
Porapak Q ◽  
Solid Liquid

scholarly journals Concentration in Porapak Q Column of Volatile Compounds in Sake for Analysis.

1993 ◽  
Vol 67 (4) ◽  
pp. 685-692 ◽  
Author(s):  
Koji SAKAMOTO ◽  
Mitsuya SHIMODA ◽  
Yutaka OSAJIMA
Keyword(s):  
Volatile Compounds ◽  
Porapak Q

Gas Chromatographic Determination of Residual Hexane in Modified Hop Extract

1972 ◽  
Vol 55 (6) ◽  
pp. 1226-1227
Author(s):  
Mark A Litchman ◽  
Lewis A Turano ◽  
Ronald P Upton
Keyword(s):  
Liquid Chromatography ◽  
Quantitative Determination ◽  
Chromatographic Determination ◽  
Methanol Solution ◽  
Chromatographic Column ◽  
Gas Liquid Chromatography ◽  
Porapak Q ◽  
Residual Hexane ◽  
Head Space

Abstract A method is described for the quantitative determination of hexane in modified hop extract by head-space gas-liquid chromatography. A sample of extract is weighed into a serum vial and water-methanol solution is added. The vial is sealed tightly and heated 1 hr in a 70°C bath. A sample of the head-space gas over the solution is injected onto a Porapak Q gas chromatographic column for determination. Recovery of 2–29 ppm hexane added to potassium isohumulone was 95.5–114.8%. The method may be applicable to other hop extracts.

Collaborative Study of a Gas Chromatographic Determination of Methylene Chloride, Ethylene Dichloride, and Trichloroethylene Residues in Spice Oleoresins

1968 ◽  
Vol 51 (4) ◽  
pp. 825-828
Author(s):  
Laura A Roberts
Keyword(s):  
Methylene Chloride ◽  
Collaborative Study ◽  
Chromatographic Determination ◽  
Chromatographic Column ◽  
Ethylene Dichloride ◽  
Gas Chromatograph ◽  
Porapak Q ◽  
Relative Retention ◽  
Solvent Residues

Abstract A method for the gas chromatographic determination of methylene chloride, ethylene dichloride, and trichloroethylene residues in spice oleoresins was studied collaboratively. The method employs a microcoulometric gas chromatograph fitted with a Porapak Q column and is based on the volatility of the solvent residues, their relative retention times on a polyaromatic bead chromatographic column, and their detectability by a halide-specific microcoulometric method. Recoveries were adequate when the method was closely followed; recoveries were erratic when collaborators deviated from the method. Further study is recommended.

Determination of Propylene Glycol in Cosmetics by Gas Chromatography

1967 ◽  
Vol 50 (6) ◽  
pp. 1284-1286
Author(s):  
Frederick C Gross ◽  
John H Jones
Keyword(s):  
Gas Chromatography ◽  
Propylene Glycol ◽  
The Other ◽  
Porapak Q ◽  
Hydrogen Flame ◽  
Flame Detector

Abstract Propylene glycol in cosmetics can be determined by co-distillation in water followed by GC measurement of the distilled propylene glycol on a Porapak Q column and a hydrogen flame detector. The procedure has been successfully applied to a number of commercial samples; 14 of 15 sample recoveries were between 95 and 102%, the other recovery was 92%.

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