TY - JOUR
T1 - Sensitive determination of chromium by inductively coupled plasma mass spectrometry using chelate-enhanced nebulized film dielectric barrier discharge vapor generation
AU - He, Qian
AU - Li, Chenchen
AU - Kong, Xiangyu
AU - Zhao, Minggang
AU - Zhang, Jing
N1 - Publisher Copyright:
© 2022 The Royal Society of Chemistry.
PY - 2022/7/27
Y1 - 2022/7/27
N2 - In this work, a novel and sensitive procedure for Cr determination by inductively coupled plasma mass spectrometry (ICP-MS) with a chelate-enhanced nebulized film dielectric barrier discharge (NFDBD) vapor generation sampling system was developed. Using sodium diethyldithiocarbamate (DDTC) as a chelating reagent, the sensitivity of Cr(vi) was specifically increased 10.5-fold by the DDTC-enhanced NFDBD sampling system compared with pneumatic nebulization. The enhancement mechanism and the experimental parameters for Cr(vi) determination such as the DDTC concentration, the solution pH, the input discharge voltage and the argon (DBD plasma gas) flow rate were evaluated in detail. The interferences from the sample matrix at 10-100 mg L−1 level were found negligible for trace Cr(vi) determination in the NFDBD sampling system. Under optimized conditions, the relative standard deviation for Cr(vi) was 1.4% at the concentration of 5 μg L−1 and the detection limit for Cr(vi) was 0.023 μg L−1. After oxidation of the Cr species to Cr(vi), the total Cr in environmental and biological samples could be sensitively determined by this DDTC-enhanced NFDBD-ICP-MS system. The determined values of the total Cr (29.8 ± 0.3 ng g−1 and 402.8 ± 18.8 ng g−1) in the standard reference materials of the simulated natural water sample (GBW08608) and biological tissue sample (GBW10210) agreed well with the certified values (30 ± 2 ng g−1 and 0.4 ± 0.08 μg g−1), respectively. It is also worth noting that this is the first report to use DBD induced vapor generation of Cr. Compared with other sampling techniques such as chemical vapor generation and electrothermal vaporization, this proposed technique has a competitive detection limit for trace Cr determination. Furthermore, it eliminates the additional reducing agent for vapor generation, and could operate with low cost and low power (≤65 W).
AB - In this work, a novel and sensitive procedure for Cr determination by inductively coupled plasma mass spectrometry (ICP-MS) with a chelate-enhanced nebulized film dielectric barrier discharge (NFDBD) vapor generation sampling system was developed. Using sodium diethyldithiocarbamate (DDTC) as a chelating reagent, the sensitivity of Cr(vi) was specifically increased 10.5-fold by the DDTC-enhanced NFDBD sampling system compared with pneumatic nebulization. The enhancement mechanism and the experimental parameters for Cr(vi) determination such as the DDTC concentration, the solution pH, the input discharge voltage and the argon (DBD plasma gas) flow rate were evaluated in detail. The interferences from the sample matrix at 10-100 mg L−1 level were found negligible for trace Cr(vi) determination in the NFDBD sampling system. Under optimized conditions, the relative standard deviation for Cr(vi) was 1.4% at the concentration of 5 μg L−1 and the detection limit for Cr(vi) was 0.023 μg L−1. After oxidation of the Cr species to Cr(vi), the total Cr in environmental and biological samples could be sensitively determined by this DDTC-enhanced NFDBD-ICP-MS system. The determined values of the total Cr (29.8 ± 0.3 ng g−1 and 402.8 ± 18.8 ng g−1) in the standard reference materials of the simulated natural water sample (GBW08608) and biological tissue sample (GBW10210) agreed well with the certified values (30 ± 2 ng g−1 and 0.4 ± 0.08 μg g−1), respectively. It is also worth noting that this is the first report to use DBD induced vapor generation of Cr. Compared with other sampling techniques such as chemical vapor generation and electrothermal vaporization, this proposed technique has a competitive detection limit for trace Cr determination. Furthermore, it eliminates the additional reducing agent for vapor generation, and could operate with low cost and low power (≤65 W).
UR - http://www.scopus.com/inward/record.url?scp=85136059107&partnerID=8YFLogxK
U2 - 10.1039/d2ja00235c
DO - 10.1039/d2ja00235c
M3 - 学術論文
AN - SCOPUS:85136059107
SN - 0267-9477
VL - 37
SP - 1876
EP - 1882
JO - Journal of Analytical Atomic Spectrometry
JF - Journal of Analytical Atomic Spectrometry
IS - 9
ER -