ASSESSMENT OF LITHIUM IN TRANSYLVANIAN MINERAL WATERS USING THE PLATINUM-WIRE LOOP FAES TECHNIQUE

作者：Zsigmond Andreea R^*; Kekedy Nagy Ladislau; Cordos Emil A; Marutoiu Constantin

来源：Environmental Engineering and Management Journal, 2012, 11(9): 1561-1566.

• FAES
• lithium
• mineral water
• platinum-wire

The survey of the lithium content of several spring and bottled mineral waters originating from Transylvania (Romania) has been carried out by atomization of 3 mu L sample from a Pt-wire loop in the methane-air (M-A) flame. The quantification conditions were optimized, they are: atomic emission at lambda = 670.8 nm, the height of 5 mm over the burner head, gas flow rates of 300 L h(-1) air and 34 L h(-1) methane. The effect of Na, K, Mg, Ca, NO3-, PO43-, SO42- and H3BO3 on the emission of lithium was studied, too. The limit of quantification (6 sigma) obtained is of 0.35 +/- 0.14 mu g L(-1)or 1.05 +/- 0.42 pg, respectively (P = 0.05). Boric acid was found to be an efficient matrix modifier. The lithium content of the samples was determined with continuous nebulization and by atomization from the Pt-wire. Both the standard calibration curve and the standard addition method were used. The results of the two procedures correspond within the determination errors.

• 出版日期2012-9