Subject: How can I detect a specific amount of hydrofluoric acid in solution?

I work for a company that handles chromium and nickel plating for the tool & 
die and medical industries, among others. We use hydrofluoric in an etch tank 
that also contains sulfuric acid and a few other catalysts. Every so often, 
we'll need to add a little of this or a little of that to maintain the 
appropriate concentrations of each chemical, but our accuracy is currently 
varified via the guess-n-check method: depending on how subsequent parts plate 
(or fail to), we can usually tell whether we need more or less of something. 
I would like to improve the accuracy and speed of this process by finding a 
way to specifically isolate the concentration levels of some of these 
chemicals, in this case the hydrofluoric.

I do have a fairly extensive lab available to me, with a wide selection of 
reagents. Is there some simple testing a can do to obtain an accurate % per 
volume?

Re: How can I detect a specific amount of hydrofluoric acid in solution?