[Application of microwave dissolution and inductively coupled plasma-MS spectrometry for determination of ultra-trace level of lanthanides in human rib].
A new method for the determination of ultra-trace level of lanthanides such as La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm Yb and Lu in human rib is explored. Closed-vessel microwave digestion with concentrated HNO3 is used for the sample preparation and the digested analyte is directly analyzed by ICP-MS. The method is sensitive and accurate and, is efficient for the determination of the fourteen lanthanides listed above. Detection limit for various elements ranges from 0.0007 microgram/L to 0.005 microgram/L. Calibration plots exhibit good linearity with high linear correlation coefficient r > or = 0.997. Recoveries of spiked samples ranges from 93.7% to 115.4%. Precision is < 3% RSD. Rhodium is used as the internal standard to compensate the signal suppression caused by the sample matrix. Isobaric overlap of polyatomic ions caused by matrix oxide/hydroxide of barium is corrected by interference correction factor. Two standard reference materials, namely "Human Hair GBW07601" and "Wheat Flour GBW08503" are used for quality control of the analyzed samples.
Liu
Guihua
G
Shenzhen Hygiene and Epidemic Station, Shenzhen 518020, China.
Xie
Jianbin
J
Liu
Xiaoli
X
Gao
Junquan
J
D000328:Adult; D006801:Humans; D028581:Lanthanoid Series Elements / Q000032:analysis*; D008297:Male; D013058:Mass Spectrometry / Q000379:methods; D008872:Microwaves; D012272:Ribs / Q000737:chemistry*
D028581:Lanthanoid Series Elements