[Histonet] Thanks for Help!

[Bryan Llewellyn]

To measure the specific gravity without a hydrometer:

1.    Weigh a container that will take just over 10 mL to 4 decimal places.
2.    Using a volumetric pipette, place 10 mL of the methanol into the
container.
3.    Weigh it again to 4 decimal places.
4.    Subtract the weight of the empty container from the weight with the
methanol to get the weight of 10 mL methanol.
5.    Divide the weight of the methanol by 10 (move 1 decimal place to the
left).
6.    That is the specific gravity of the methanol.  Compare it to a chart
of concentrations.

Bryan Llewellyn


----- Original Message ----- 
From: "María Teresa Domínguez" <marytedo <@t> hotmail.com>
To: <Histonet <@t> lists.utsouthwestern.edu>
Sent: Wednesday, April 07, 2004 12:09 PM
Subject: [Histonet] Thanks for Help!


>
>    Well,
>
>             We  haven't  bought  this  Methano.  I  t was a "gift" from a
>    private  lab,  they  bought  some  to  a new Co. and they sent to us 5
>    liters ina big bottle, that's why I couldn't get any information about
>    this alcohol.
>
>     Now,  the  problem  is  we don't have an Hidrometer, so we checked it
>    with  2  ml.  of  Methanol in a little tube and  0,5 ml of oil, then I
>    shaked  them,  and  I could see little drops of oil, like an emulsion,
>    the  solution  changed  the  colour, it turned white with drops in it.
>    Maybe water??
>
>    The  last step I did. I compair the solution with the Methanol we have
>    kept  in  the  lab which I know it is 98.8 % pure with 0,1% water. The
>    drops of oil were quite bit less than in the other solution. What does
>    it means??
>
>                                                                  I   need
>    someone who knows about chemistry soon!!
>
>    Thanks again for your advices and HAPPY EASTER! for everyone.
>    H.T. Maria Teresa Dominguez
>
>    Anatomy Pathologyc,
>
>    Zonal Hospital of Río Grande,
>
>    Tierra del Fuego, Argentina.
>      _________________________________________________________________
>
>    MSN 8 with [1]e-mail virus protection service: 2 months FREE*
>
> References
>
>    1. http://g.msn.com/8HMBEN/2740??PS=
> _______________________________________________
> Histonet mailing list
> Histonet <@t> lists.utsouthwestern.edu
> http://lists.utsouthwestern.edu/mailman/listinfo/histonet
>
>