[Effect of certain factors on the quality of the indicator tubules for determining hydrogen sulfide]

Silicagel with size of granules 0.315 - 0.400 mm was used for carrier of indicator reagents in tubes for hydrogen sulphide. A planned experiment was carried out, with the purpose of establishing the influence of seven factors on the qualities of the silicagel-carrier and the tubes. It was found that essential is indicator powder porosity and humidity. An optimal amount of water to be added to keep powder humidity was found. The influence of acid processing of the carrier was also studied. Acid treatment was shown to increase carrier adsorption capacity, which affected both the ability of the carrier to take in indicator reagents and tubes quality. It was shown that tubules, prepared on the basis of acid-nontreated, but only heated at 600 degrees C carrier, are of superior quality, so long as the requirements for indicator powder humidity have strictly been observed.