Z. Gao et al., A new mathematical model for investigating the sampling errors of two-component particulate mixtures, CHEM J CH U, 20(3), 1999, pp. 387-391
A new mathematical model was established for investigating the sampling of
two-component particulate mixtures by mass. By the introduction of a;new co
ncept named as logical unit of sampling by mass, equations of estimating th
e standard deviation and relative standard deviation of sampling by mass we
re presented. The physical meaning of the logical unit Of sampling by mass
was also studied. These equations were verified by the sampling for chemica
l analysis of two-component medicine tablets. This theory is generally appl
icable so as to enrich the sampling theory of analytical chemistry and dire
ct the sampling practices.