Patent ID: 6387704
Filing Date: 2002-05-14
Classification: G01N,Y10T

Abstract:
In a method for conducting sorption analysis in a sorption analyzer system, a test sample being in a sample cell and the sample cell being in a Dewar, there being liquid coolant in the Dewar at a certain initial height level and surrounding the sample cell; the sorption analysis progressing over a length of time, during which the liquid coolant evaporates from the Dewar, the improvement comprising the steps of:a) establishing a relative vertical relationship between the sample cell and the Dewar; b) fixing that vertical relationship for the duration of the analysis; c) permitting the liquid coolant to evaporate over time, thereby lowering its level within the Dewar and around the sample cell; d) letting said lowering of coolant level result in time-dependent temperature changing of a stem portion of the sample cell; e) allowing, by said temperature changing, time-dependent errors to occur during the sorption analysis; f) correcting for such time-dependent errors by: i) utilizing fixed and time variable sorption analyzer system data, such data being exclusive of direct measurement of time-dependent coolant level lowering in the Dewar during the sorption analysis of the sample; ii) obtaining time-dependent compensating data from said step of utilizing; and g) compensating for the time-dependent temperature changing over the length of time of coolant evaporation with use of the compensating data.