RE: Alcohol and Xylene Recycling

From:"Marshall Terry, Consultant Histopathologist"

You don't give any interpretation of results.
What are we aiming for, and what should we accept (in both)?

Terry L Marshall B.A.(Law), M.B.Ch.B., F.R.C.Path
Consultant Histopathologist
Rotherham General Hospital, Yorkshire 


-----Original Message-----
From: Tony Henwood []
Sent: 16 June 2002 23:43
To: 'John Spair'; ''
Subject: RE: Alcohol and Xylene Recycling

This is from our waste manual: 

Quality Control of Recycled Solutions 
1. Xylene Solubility of Wax (1) 
1. Take 1 gram of wax and mix in 20ml of xylene 
2. Record time for full dissolution 
3. Check for any undissolved residues and contaminants 

2. Xylene miscibility 
Take 20ml of xylene and add 20ml alcohol, recording the appearance of the solution 


1. Massey, J., (1993) "Quality control for tissue processing" Lark News 1(3):6-7. 

This doesn't actually test the purity of the xylene, but it does give some confidence in the use of the xylene for routine Histo use.

Hope this helps, 

Tony Henwood JP, BappSc, GradDipSysAnalys, CT(ASC) 
Laboratory Manager 
The Children's Hospital at  Westmead, 
Locked Bag 4001, Westmead, 2145, AUSTRALIA. 
Tel: (02) 9845 3306 
Fax: (02) 9845 3318 

-----Original Message----- 
From: John Spair [] 
Sent: Saturday, 15 June 2002 6:38 
To: '' 
Subject: Alcohol and Xylene Recycling 

I know many people are using stills these days to recycle alcohol and 
xylene.  It's easy to check the alcohol with a hydrometer to determine 
percent of the distilled product, but has anyone come up with a method of 
checking the xylene for purity without having to send it somewhere for 
analysis??? Thank you 

John Spair,  System Manager 
Pathology Services 
MultiCare Health System 

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