Determination of Carbon Monoxide in Hydrocarbon Gases Containing Olefins

Thomas, P. R.; Donn, Leon; Levin, Harry

doi:10.1021/ac60036a012

Cited by 4 publications

(3 citation statements)

References 17 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Measurement of carbon monoxide concentration in ppm (v/v) level, [CO g ] using either wet chemical methods after sample preconcentration, or direct instrumental techniques are known [1][2][3][4][5][6][7][8]. In the former category, the Ciuhandu method recommended for sampling/analysis [8] deals with the formation of a yellow-orange colored silver sol in alkaline solution [6,7], wherein dissolved CO reduces the Ag + complex of 4-carboxybenzenesulphonamide, (4)-HCO 2 -C 6 H 4 -SO 2 NH 2 (4-CBSA).…”

Section: Introductionmentioning

confidence: 99%

Wet Chemical Colorimetric Estimation of CO: An Update on the Reduced Silver Sol Spectral and Kinetic Transformations to Silver nanoparticle

2006

View full text Add to dashboard Cite

Measurements of ppm (v/v) level CO g concentration is conveniently performed by its preconcentration in alkaline absorber solution of Ag + -(4)-HCO 2 -C 6 H 4 -SO 2 NH 2 complex, followed by a spectral measurement of the reduced silver sol. In this study, the transitory nature of this latter species and its subsequent real-time transformation to silver nanoparticle are presented. These results were based on spectral measurements made under varying concentrations of alkali, (4)-HCO 2 -C 6 H 4 -SO 2 NH 2 , and Ag + in the absorber solution, and in the presence of a wide range of sampled CO g concentration. The initially created light yellow colored sol with its broad absorption profile peaking at 380 nm and absorption coefficient 3500± 300 cm −1 M −1 (related to the amount of sampled [CO g ] as standardized by gas chromatographic analysis) changed into the characteristic yellow orange nanoparticle with its plasmon band peak absorption at 425 nm and absorption coefficient 6350 ± 300 cm −1 M −1 . Under different sampling conditions, the respective first-order conversion rates varied between 0.03 and 0.15 h −1 , whereas simultaneous dynamic light scattering measurements revealed steady growth of the averaged particle size ranging from 60 to 300 nm.

show abstract

Section: Introductionmentioning

confidence: 99%

Wet Chemical Colorimetric Estimation of CO: An Update on the Reduced Silver Sol Spectral and Kinetic Transformations to Silver nanoparticle

2006

View full text Add to dashboard Cite

show abstract

“…Because gaseous hydrocarbons, other than methane, react with heated iodine pentoxide (1, 9), a separation of the carbon monoxide is required. To accomplish this, procedures based on condensing the hydrocarbons in a liquid nitrogen trap (8), or by absorbing them in concentrated sulfuric acid (9,10) have been used. However, these two methods are not practical in the determination of a few parts per million of carbon monoxide in hydrocarbon gases.…”

Section: Acknowledgmentmentioning

confidence: 99%

“…en Content Nitrogen, P.P.M. Theory Found iodine on the digestion of pyridine is A comparison was made between samples of unknown but very low nitrogen content which had been analyzed by the Universal Oil Products hydrogenation procedure (8) and by this method. Results are shown in Table IV.…”

mentioning

confidence: 99%