Finding dissolved Aluminum in Acid solution

[Nikhileshlal]

Dear All,
I work towards realizing Aerospace parts. We etch Aluminum by phosphoric acid. Procedure requires us to do atomic absorption for finding the quantity of dissolved aluminum in acid solution.
I do not have facility for Atomic absorption method though I have an acceptable facility for normal titration (volumetric analysis) compatible to Aerospace requirements.
Can you suggest any method of finding dissolved aluminum in acid solution?

Regards
Nikhilesh Lal
Hyderabad, India.

 

[Borek]

http://www.titrations.info/EDTA-titration-aluminum

However, it doesn't have to work if your solution contains other cations - which can be a reason behind using spectroscopy.