[Histonet] CHECKING ALCOHOL CONCENTRATIONS

[Amos Brooks]

Wow Bryan,
	That's pretty slick. Obviously weighing it would do the trick I hadn't 
thought of that. I'll have to remember that the next time I mindlessly try to 
shake the excess liquid off my hydrometer and have it break in my hands. Gosh 
I hated that! That is definitely a great and probably more precise way of 
doing it.

Amos


On Thursday 25 November 2010 03:11:07 pm Bryan Llewellyn wrote:
> Specific gravity is mass/volume.  In this context that is grams/millilitre.
> It can easily be measured without a hydrometer.
>
> 1.  Obtain a 10 ml beaker and weigh it to 2 decimal places.
> 2.  Measure 10 mL of the alcohol with a volumetric pipette and place in the
> beaker.
> 3.  Reweigh the beaker with the alcohol in it, again to 2 decimal places.
> 4.  Subtract the weight of the beaker from the weight of the beaker and
> alcohol, giving the weight of the alcohol
> 5.  Divide the weight of the alcohol by 10 to get the SG to 3 decimal
> places.
>
> Bryan Llewellyn
>
>
> ----- Original Message -----
> From: "Amos Brooks" <amosbrooks <@t> gmail.com>
> To: <histonet <@t> lists.utsouthwestern.edu>; <Vickroy.Jim <@t> mhsil.com>
> Sent: Thursday, November 25, 2010 3:14 AM
> Subject: [Histonet] CHECKING ALCOHOL CONCENTRATIONS
>
>
> Hi Jim,
>      Hydrometers can get really expensive. I searched around for one with a
> good price and stumbled on this one from Cole Parmer (now Thermo like
> everyone else in the world):
> Thermo Scientific ERTCO® Alcohol Hydrometer, 0 to 100% Tralle, 0 to 200
> Proof,
> Plain Form ... CAT# EW-08285-00
> I picked it up for $29.50, but that was with my University discount. I'm
> not sure what regular price is or what discounts you might be able to get.
> It sure
> beat the heck out of some of these $200 ones out there. This one has both
> ETOH
> percentages as well as ETOH proofs. It works well for us.
>
> Happy Thanksgiving,
> Amos
>
>
> Message: 4
> Date: Tue, 23 Nov 2010 13:02:24 -0600
> From: "Vickroy, Jim" <Vickroy.Jim <@t> mhsil.com>
> Subject: [Histonet] CHECKING ALCOHOL CONCENTRATIONS
> To: "histonet <@t> lists.utsouthwestern.edu"
> <histonet <@t> lists.utsouthwestern.edu>
> Message-ID:
> <24A4826E8EF0964D86BC5317306F58A55510FE3506 <@t> mmc-
> mail.ad.mhsil.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Does anyone know where we can purchase a hydrometer or other instrument 
for
> confirming alcohol percentages, such as 70, 85, 95, 100? We had a mixup in
> chemicals on a processor and I am going to be asked about instruments to
> confirm percentages before processing.
>
> Meeting with risk management tomorrow.
>
>
> James Vickroy BS, HT(ASCP)
>
> Surgical and Autopsy Pathology Technical Supervisor
> Memorial Medical Center
> 217-788-4046
>
> _______________________________________________
> Histonet mailing list
> Histonet <@t> lists.utsouthwestern.edu
> http://lists.utsouthwestern.edu/mailman/listinfo/histonet