Zs. Czegeny et al., Homogeneity and stability studies on sodium, calcium, magnesium, and manganese in human saliva, BIOL TR EL, 79(2), 2001, pp. 131-137
This article reports on the homogeneity and stability of saliva samples tre
ated and stored under different conditions. The analytes chosen for this ev
aluation were Na, Ca, and Mg as minor elements and Mn as the trace element.
The results obtained show that when the sample was homogenized in an ultra
sonic bath, a minimum volume of 0.25 mt was required to consider the sample
homogeneous. The stability of the analytes depended on their concentration
. The Ca and Mg content seemed to be stable for at least 1 wk when the samp
les were stored at room temperature, whereas the Mn content seemed to be un
stable for 1 d even when the sample was stored at -20 degreesC.