Summary for iron titration in sulfuric acid Discussion
Iron titration in sulfuric acid is questioned as a practical method for plating baths. Chris Ballew asked for a simple titration to measure iron concentration in a sulfuric acid bath so he could set a tank dump schedule. John Persaud replied that the real issue is whether a titration would work at all, since the expected iron concentration was not stated and titrations usually need much higher concentrations to be effective. He said this type of determination is usually done instrumentally, such as by AA or ICP, rather than by titration. James P. Saunders later asked a similar question about hydrochloric acid baths, looking for a simple titration to measure iron from 0.5 to 10 g/L, but no answer is shown in the excerpt. The thread therefore leans toward instrumental analysis rather than a simple titration for low-level iron monitoring.
Q. Does anyone know of a simple titration for iron concentration in a sulfuric acid bath for plating operations. I would like to be able to determine the iron level to establish a tank dump schedule.
Thanks
Chris Ballew
– Newport, Tennessee USA
2000
At this point, it is really a question of whether a titration would really work. You don’t mention what concentration you expect to find. This determination is usually done instrumentally, AA, ICP, etc. Titrations normally require much higher concentrations to be effective.
James Totter, CEF
– Tallahassee, Florida
2000
The purpose of this titration is to determine when to dump the sulfuric acid bath. I am looking for a titration to determine iron concentrations in the grams per liter range and we would expect to dump the bath at approximately 15 grams/Liter.
Chris Ballew
– Newport, Tennessee
2000
A good titration procedure can be found in “ASM Handbook”
Volume 5: Surface Engineering. Look for references that deal with pickling or descaling.
Terry Natale
– Cleveland, Ohio
2000
A. There are two methods, based on permanganate and dichromate respectively, given in Langford & Parker [on
AbeBooks or
eBay or
Amazon affil links]
John Persaud
– Reading, Berkshire, UK
Q. I have a similar question regarding the determination of iron in an hydrochloric acid bath. We are looking to find a simple titration that would allow us to measure iron in the range of .5 grams and 10 grams per liter.
Thanks.
James P. Saunders
– Aston, Pennsylvania, USA
2001