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- W2364755675 abstract "The determination of trace calcium,magnesium and sodium in high-purity lead by flame atomic absorption spectrometry was proposed after the lead matrix was removed by electrolysis.The acidity and time of electrolysis and the rinse of platinum electrode were investigated.It was found that the remainder amount of lead in the solution after eletrolysis was the least when HNO3(1+3) was used as the medium of dissolution and electrolysis and eletrolysis time was set up as 3 h.Compared with hydrochloric acid,use of the mixed solution of 20 g/L ascorbic acid and 4%(V/V) acetic acid for rinsing platinum electrode which adsorbed PbO2 could decrease the loss of platinum electrode.The impurities in lead did not interfere in the determination. It was applicable for the determination of calcium,magnesium and sodium with the linear ranges of 0-4.00 μg/mL,0-0.80 μg/mL and 0-0.80 μg/mL respectively.The detection limits were 0.061 μg/mL for Ca,0.006 6 μg/mL for Mg and 0.011 μg/mL for Na.The relative standard deviation were 14 %-19 % for nine determination of Ca,Mg and Na in a high-purity lead sample,and the recoveries were in the range of 89.0%-107.5%." @default.
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- W2364755675 title "Determination of trace calcium,magnesium and sodium in high-purity lead by flame atomic absorption spectrometry" @default.
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