Dear Connie,
    Polysciences MMA is inhibited with 25ppm HQ.  Please let me know if
I can be of further assistance.
Regards,
    Jane M. Woodruff
    Product Manager, Microscopy

connie mcmanus wrote:

> Mary,
>
> Your comments on greening an acid indication... it all comes back to
> me now
> (it's been over 15 years ago)... these are the things my mentor,
> Rosmarie,
> told me when I was being trained in this.  She also pointed out that
> R&H's
> MMA had the highest ppm of HQ of any other MMA available.  I was
> hoping all
> MMA was up to this standard by now, but I guess not.
>
> Polysciences people... what ppm of HQ is in your MMA?
>
> Connie McManus
> Veternary Diagnostics Lab
> Utah State University
> Logan, Utah
>
> >
> >Sometimes I feel like working with MMA/bone is like encountering
> >aliens - not that I've had that "experience" - but can only imagine!
> >
> >Regarding the 'green tinge' thing, I 'heard' it was because it was
> >starting to go acidic - aka breaking down, impurities may be a better
>
> >explanation since it's still within the shelf life provided.  What I
> >don't know is why different companies which sell MMA have such varied
>
> >shelf life dates for their products.  I'm sure the HQ concentration
> >effects it, but Fisher and Baker have ~ the same, as does the
> >Polysciences.  I recall Rohm & Haas used 60ppm HQ, and we used to
> >always order it with "date stamped less than 1 year from
> >manufacture."   I just double checked our Fisher and Baker bottles --
>
> >neither has an expiration date on them!!  After all this is said, I
> >think I will try the Polysciences product next!
> >
> >Ah.... the wonders of MMA -



--
Jane M. Woodruff
Polysciences Inc                Phone: 215-343-6484
400 Valley Rd.                         800-523-2575
Warrington, PA 18976            Fax:215-343-0214
E-mail  polysci@tigger.jvnc.net