I have not done this kind of samples, but try HCL + H2SO4 + H2O2 and evaporate to SO3 fumes.Cr, Ti
dissolve well in H2SO4. Do not go to dryness - if not insolluble sulfates might be formed.
From: R.Knight [mailto:[log in to unmask]]
Sent: Friday, April 26, 2002 4:22 AM
To: [log in to unmask]
Subject: Re: Dissolving a pigment
It might be worth trying a slurry nebulisation stirring with water and triton-X and zirconia beads
overnight to make a colloidal suspension
before introduction to the ICP. We have used it on the AES for very
insoluble pigments with some success in the past, but I don't know how
the MS will cope. If the slurry stays in suspension it should go
through a high solids neb. It sound simple but it does work
University of Hull
On Thu, 25 Apr 2002 15:21:12 -0700 Mahabub Rahman <[log in to unmask]>
> I am trying to dissolve a pigment (Cr/MgF2/Al/MgF2/Cr) for ICPMS/AES
> analysis. Seems like this particular pigment is so arrogant. I have
> dissolved pigments (Nb/MgF2/Al) and (TiN/SiO2/Al/SiO2/TiN)before
> mainly in a combination of HCl/HNO3 and HNO3/HF acid respectively.
> But this time its giving us really hard time.
> Does any one would like to share his/her experience or knowledge
> regarding this? Your help is appreciated in advance.
> Thank you
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