[Quantitatively determining trace elements Co and Bi in gelatin by inductively coupled plasma atomic emission spectrometry method--applying IEC model to correct the spectral interference of Fe to Co].
By ICP-AES, the authors established the method to quantitatively determine the trace elements Co and Bi in gelatin. The authors processed the unknown sample with wet digesting method. Trace elements in gelatin could be quantitatively determined at the same time. To correct the spectral interference of Fe to Co at specific wavelength, the Interelement Correction(IEC) model was established. The results of the experiment showed that the IEC model could effectively erase the spectral interference of Fe to Co. The result of the spectral correction was greatly superior to the result where the spectral interference weren't corrected by the IEC model. The method was accurate, quick with high performance and wide linear range. The linear correlation coefficient of the tested elements was over 0.999 90. The relative standard deviation (RSD%) was less than 2.00%. The recovery rates were in the range of 98%-107%.
Du
Bao-An
BA
Analytic Science and Technology Laboratory of Hebei Province, Medicine Department of Chemistry and Environment Science Institute, Hebei University, Baoding 071002, China.
Shen
Shi-Gang
SG
Li
Zhi-Ting
ZT
Xu
Jian-Zhong
JZ
Ma
Li-Qian
LQ
Sun
Han-Wen
HW
D001729:Bismuth / Q000032:analysis* / Q000737:chemistry; D003035:Cobalt / Q000032:analysis* / Q000737:chemistry; D005780:Gelatin / Q000032:analysis* / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D016014:Linear Models; D015203:Reproducibility of Results; D013054:Spectrophotometry, Atomic / Q000379:methods*; D014131:Trace Elements / Q000032:analysis* / Q000737:chemistry
D014131:Trace Elements; D003035:Cobalt; D005780:Gelatin; D007501:Iron; D001729:Bismuth