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Cr+6 in Fumes from Welding Stainless Steel

Q. Please, what is the best way or equipment to analyze for Cr+6 in welding fume using Stainless steel as a base metal? I want to analyse welding fumes from Gas and Arc welding using Stainless steel as a base metal. How can I analyze Cr+6 using AAS ... and if AAS can only be used to measure total Cr, what is the best or suitable instrument I can use for Cr+6 analysis?

Olayinka AGBAJE
Student - Lagos, Nigeria
January 18, 2026

Hi Olayinka

We welcome your question, but this site tends to attract the eyes of people involved in metal finishing rather than welding. We certainly hope someone with such knowledge and experience will see your question and help, but you might also look for a welding forum or an industrial hygiene forum.

Luck & Regards,

Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.

AA would not be suitable because it makes no distinction between trivalent and hexavalent. For industrial hygeine testing, you only want hexavalent and it needs a very low detection level. OSHA ID-215 is the correct method which uses ion chromatography. You will likely need to hire a local Industrial Hygienist who is familiar with the test and who has the necessary sampling and lab equipment.

Jon Barrows, MSF, EHSSC
Independence MO

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