What is the reason for the low carbon measurement value of the cs30 series carbon sulfur analyzer?
Many industrial laboratories in the determination of carbon and sulfur in steel by using the method of determination of contact often, the sample by the high temperature combustion produces carbon dioxide, sulfur dioxide, after absorption of starch solution (H2O2 solution absorption), by iodometric titration of sulfur (or acid-base titration), the determination of the residual gas of carbon into carbon the instrument, it should be noted that when the mixed gas through the starch solution (neutral or acidic), there will be a small amount of carbon dioxide absorbed (H2O2 solution by the same), thus resulting in low carbon determination results.
Wu Jizu pointed out that the experiment: cast iron [omega (C) about =3.6%, the sample is 0.25g], according to the theoretical calculation of low of about 0.08%; high carbon steel [w (C) =1%, the sample is 1.0g], low of about 0.03%; low carbon steel [w (C) <0.4%] was not affected by. So in the carbon and sulfur in conjunction on high carbon sample determination results of standard samples with carbon content correction or similar determination according to the operation method of the same, to check the sample, prevent mistakes.
