Absorption-Titration Flask for Determination of Sulfur in Steel

Activity Coefficients of Sodium Chloride and Potassium Chloride in Mixed Aqueous Solutions at 25°

“…x[(aB + ac) -2m(/Sc -/3b)] -2ac (3) and if /3b = /3c (not necessarily /3b = /3c = 0) -55.51/(zm2) log aw/awio = x(asac) -2ac (4)…”

Combustion Method for Determination of Sulfur in Ferrous Alloys

“…Burn for 3 minutes, maintaining plate current as high as possible without overloading the induction furnace. (1,4,6). This nonaqueous procedure was developed for the many mater-insoluble samples routinely received for analysis in these laboratories.…”

“…Limited experience with THAM [tris(hydroxymethyl)aminomethane] as titrant indicates that it is equally reliable and is subject to the same correction factor. Others have pointed out certain advantages which this reagent has over sodium hydroxide (1,4). The following procedures are therefore given with a choice between these titrants left to the discretion of the operator.…”

“…For this reason also, the expulsion of air prior to desorption and transference of the sample into the helium stream is essential. Polarity and, to a greater extent, latent heat of vaporization are responsible for tailing effects in regular gas chromatography (4). Because there is no mass transfer or change of state in the empty tube experiments, the absence of tails and the identical nature of the distribution curves are to be expected.…”