Abstract：After the sample was digested with mixed acid(hydrochloric acid-nitric acid-sulfuric acid-hydrogen peroxide), an inductively coupled plasma mass spectrometry (ICP-MS) was developed for the determination of sodium, magnesium, aluminum, calcium, titanium, chromium, manganese, cobalt, nickel, copper, zinc and lead in lithium iron phosphate with microwave digestion. The maximum experiment condition was as follows: lead was determined by normal mode; sodium, magnesium, aluminum, titanium, chromium, manganese, cobalt, nickel, copper, zinc were determined by collision gas hellum; calcium was determined by reaction gas hydrogen mode; the flow rate of collision gas hellum was 5.6 mL/min; the flow rate of reaction gas hydrogen was 6.2 mL/min; sodium, magnesium, aluminum, calcium, titanium were corrected with scandium as internal standard; chromium, manganese, cobalt, nickel, copper, zinc were corrected with yttrium as internal standard; lead was corrected with bismuth as internal standard. The detection limit of method was 4.5-28.9 ng/L. This proposed method was applied to determine elements in lithium iron phosphate actual samples with relative standard deviation(RSD, n=11) was 0.6%-1.9% and recoveries of 94%-107%. The results were consist with those obtained by inductively coupled plasma atomic emission spectrometry (ICP-AES).
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ZHONG Sheng-xian,LU Xian-you,LIU Jing-lin,ZHOU Zhi. Determination of impurity elements in lithium iron phosphate by inductively coupled plasma mass spectrometry. , 2015, 35(3): 19-24.
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