Ma. Bautista et al., FLOW-INJECTION FLAME ATOMIC-ABSORPTION SPECTROMETRY FOR SLURRY ATOMIZATION - DETERMINATION OF MANGANESE, LEAD, ZINC, CALCIUM, MAGNESIUM, IRON, SODIUM AND POTASSIUM IN CEMENTS, Fresenius' journal of analytical chemistry, 350(6), 1994, pp. 359-364
A flame atomic absorption spectrometric procedure for the rapid determ
ination of manganese, lead, zinc, calcium, magnesium, iron, sodium and
potassium in cements is described. For minor components, slurries are
prepared in the 0.05-0.25% m/v range by direct suspension of the samp
les in a medium containing 2% v/v nitric acid, 2% hydrofluoric acid an
d 30% v/v glycerol. 50-200 mul aliquots are injected in a simple flow
injection manifold using water as the carrier. When determining major
components, the FI manifold includes an easy-to-construct variable vol
ume chamber allowing the on-line dilution of the suspensions. The degr
ee of dilution can be easily modified to obtain signals within the lin
ear response range of the instrument. Aqueous standards are used for c
alibration. The data obtained for six cements agree with those obtaine
d by conventional procedures based on the compl subset-of (M)nuLe(w)et
e dissolution of the samples.