Analysis of copper alloys by inductively coupled plasma atomic emission spectrometry with spark sampling
https://doi.org/10.26896/1028-6861-2020-86-3-11-19
Abstract
A procedure for determination of Ag, As, Bi, Fe, Ni, Pb, Sb, Sn, Zn, and Cu in copper alloys using ICP AES with spark sampling has been developed. Spark sampling conditions were specified when studying the effect of discharge parameters on the line intensity and relative standard deviation (sr) (the discharge power level changed from 1 to 9 units on the SSEA scale (from 2.10 to 3.30 kW), discharge frequencies and pre-firing time ranged within 100 to 800 Hz and 30 to 70 sec, respectively). The conditions of atomic emission determination of normalized elements were studied. Analytical lines were selected taking into account the maximum intensity in the absence of spectral overlaps. The advantage of using the method of internal standard and the method of multidimensional calibration of the spectrometer is shown. Calibration of the spectrometer was carried out using monolithic standard samples of copper alloys. The accuracy of determination of the elements in copper alloys was proved in analysis of standard samples and comparative analysis of the obtained results and data obtained by recommended GOST methods. Statistical processing of the measurement results by the Student criterion did not reveal systematic errors. The results of the determinations obtained by the developed method show that rational combination of spark sampling and ICP-AES analysis provided high precision of rapid (duration of analysis is reduced to 30 minutes) and cost-effective determination without a necessity of using chemical reagents.
About the Authors
I. I. Chernikova
Lipetsk State Technical University
Russian Federation
Russian Federation
Inna I. Chernikova
30 Moskovskaya ul., Lipetsk, 398055
S. S. Fursova
Lipetsk State Technical University
Russian Federation
Russian Federation
Svetlana S. Fursova
30 Moskovskaya ul., Lipetsk, 398055
T. N. Ermolaeva
Lipetsk State Technical University
Russian Federation
Russian Federation
Tat’yana N. Ermolaeva
30 Moskovskaya ul., Lipetsk, 398055
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Review
For citations:
Chernikova I.I., Fursova S.S., Ermolaeva T.N. Analysis of copper alloys by inductively coupled plasma atomic emission spectrometry with spark sampling. Industrial laboratory. Diagnostics of materials. 2020;86(3):11-19. (In Russ.) https://doi.org/10.26896/1028-6861-2020-86-3-11-19
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