Speciation Analysis of Chromium by LC-ICP-MS Based on ISO 24384Metals Analyses
Poster Presentation
Prepared by Y. Jiang1, R. Marfil-Vega2, K. Hori1
1 - Shimadzu Corporation, 1, Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto, Kyoto, 604-8511, Japan
2 - Shimadzu Scientific Instruments, 7102 Riverwood Drive, Columbia,, Columbia, MD, 21046, United States
Contact Information: [email protected]; +81 075 823 1189
ABSTRACT
Chromium is widely utilized metal in various industrial applications, such as steel production, chrome plating, and paint manufacturing. The most common forms of chromium are trivalent chromium (Cr III), hexavalent chromium (Cr VI), and the metallic chromium. Of those, Cr VI is known as a highly toxic carcinogen. However, problems quantifying each of the Cr species are due to interferences from coexisting substances and the need for complicated pretreatment operations.
In recent years, the speciation analysis method for Cr using LC-ICP-MS has been attracting attention as a solution to such issues. In February 2024, ISO 24384 Determination of Cr VI and Cr III in water was published as a method applicable to the analysis of wastewater, surface water, groundwater, and drinking water. Effluents from electroplating industries are regulated under the Effluent Guidelines and, within that group, Chrome Finishing Facilities are under currently under higher scrutiny because of their use of PFAS for removing Cr from their discharges.
To support industries and environmental laboratories in their response to future regulations impacting the monitoring of Cr species, we performed the analysis in accordance with ISO 24384 using a Prominence Inert Analysis System connected to a Shimadzu ICP Mass Spectrometer ICPMS-2040 / 2050 Series.
In this method, Cr III is chelated using 2,6-pyridinedicarboxylic acid (PDCA) or ethylenediaminetetraacetic acid (EDTA) and then separated and quantified by LC-ICP-MS. This presentation will demonstrate that the method performance is according to ISO method 24384 is suitable to meet future regulations and analytical demands.
