[Histonet] CHECKING ALCOHOL CONCENTRATIONS

[Bryan Llewellyn]

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

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