A Method for Determination of Low Carbon Monoxide Concentration in Blood

AbstractThe gas chromatographic method described here has been developed for the determination of low carbon monoxide concentrations in air and blood. For the determination in expired air, a 4 ml sample is injected in a molecular sieve 13X column, where the CO is separated from the other gases. The CO is then hydrogenated to methane over a nickel catalyst column heated to 290°C, and the methane is determined with a flame ionization detector. The limit of detection is 0.1 ppm CO in a total sample volume of 4 ml. The standard deviation per single determination is 0.04 to 0.08 ppm CO in the CO concentration range 0.2 to 10 ppm. For the determination in blood, the CO is liberated from the HbCO complex with K3[Fe(CN)6], transferred into a molecular sieve 5A column which is cooled in liquid nitrogen, and then swept into the gas chromatographic set-up used for the determination of CO in air. 0.05 % HbCO can still be detected in a 0.1 ml blood sample. The standard deviation per single determination is 0.02 % HbCO for a total of 1 % HbCO in the blood sample.

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Pollutant emission from a heat station supplied with agriculture biomass and wood pellet mixture

Chemical and Process Engineering ◽

10.2478/v10176-012-0020-3 ◽

2012 ◽

Vol 33 (2) ◽

pp. 231-242 ◽

Cited By ~ 4

Author(s):

Marek Juszczak ◽

Katarzyna Lossy

Keyword(s):

Carbon Monoxide ◽

Pollutant Emission ◽

Heat Output ◽

Wood Pellets ◽

Wood Pellet ◽

Carbon Monoxide Concentration ◽

Heat Efficiency ◽

Air Stream ◽

Fuel Mixtures ◽

Lower Carbon

Pollutant emission from a heat station supplied with agriculture biomass and wood pellet mixtureTests for combustion of hay and sunflower husk pellets mixed with wood pellets were performed in a horizontal-feed as well as under-feed (retort) wood pellet furnace installed in boilers with a nominal heat output of 15 and 20 kW, located in a heat station. During the combustion a slagging phenomenon was observed in the furnaces. In order to lower the temperature in the furnace, fuel feeding rate was reduced with unaltered air stream rate. The higher the proportion of wood pellets in the mixture the lower carbon monoxide concentration. The following results of carbon monoxide concentration (in mg/m3presented for 10% O2content in flue gas) for different furnaces and fuel mixtures (proportion in wt%) were obtained: horizontal-feed furnace supplied with hay/wood: 0/100 - 326; 30/70 - 157; 50/50 - 301; 100/0 - 3300; horizontal-feed furnace supplied with sunflower husk/wood: 50/50 - 1062; 67/33 - 1721; 100/0 - 3775; under-feed (retort) furnace supplied with hay/wood: 0/100 - 90; 15/85 - 157; 30/70 - 135; 50/50 - 5179; under-feed furnace supplied with sunflower husk/wood: 67/33 - 2498; 100/0 - 3128. Boiler heat output and heat efficiency was low: 7 to 13 kW and about 55%, respectively, for the boiler with horizontal-feed furnace and 9 to 14 kW and 64%, respectively, for the boiler with under-feed furnace.

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