Download Tube #13 Technical Specifications

How to read this chartCarbon disulfide CS2 NO.13PerformanceMeasuring Range 0.63 to 1.25 ppm 1.25 to 2.5 ppm 2.5 to 50 ppm 50 to 100 ppmNumber of Pump Stroke 4 2 1 1/2Correction Factor 1/4 1/2 1 2Sampling TimeDetecting Limit3 minutes per pump stroke0.3 ppm (n=4)Color Change Blue YellowReaction PrincipleCarbon disulfide is oxidized by nascent oxygen, which is generated by thereaction of chromic acid and sulfuric acid to sulfur dioxide. Sulfur dioxideneutralizes barium chloride, discoloring pH indicator to yellow.CS 2+ CrO 3+ H 2S 2O 7SO 2+ CO 2SO 2+ BaCl 2+ H 2O BaSO 3+ 2HClHCl + Base ChloridesCoefficient of VariationShelf LifeCorrections fortemperature & humidityStore the tubes at cool and dark place.10% (for 2.5 to 10 ppm), 5% (for 10 to 50 ppm)3 YearsTemperature correction is necessaryPossible coexisting substances and their interferences (NOTE)Substance Concentration Interference Changes color by itself toAmmonia - No effect No discolorationHydrogen cyanide - No effect No discolorationSulfur dioxide 1/ 5 time Plus error Produces yellow stainHydrogen sulfide 200 ppm Plus error Produces yellow stainCalibration gas generationDiffusion tube methodTLV-TWA TLV-STEL Explosive range10ppm - 1.3 to 50%

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