PUBLICATIONS -- TWRI Book 5, Chapter A3, Methods for Analysis of Organic Substances in Water, by D.F. Goerlitz and Eugene Brown
 



                                           May 25, 1972


QUALITY OF WATER BRANCH TECHNICAL MEMORANDUM NO. 72.15

Subject: PUBLICATIONS -- TWRI Book 5, Chapter A3, Methods 
         for Analysis of Organic Substances in Water, by 
         D.F. Goerlitz and Eugene Brown

Attached is one copy of the subject publication which 
contains the official Geological Survey methods for analysis 
of organic substances in water. Additional copies should be 
ordered through the normal Survey distribution system .

As directed in WRD Memorandum 71.72, Division laboratories 
will use only the procedures described in this manual for 
analysis of substances covered, except where prior approval 
has been obtained from the Chief, Quality of Water Branch. 
You will note that on page 4 under the heading "Sample 
Preservation", mercuric chloride (HgC12) is recommended for 
the preservation of samples for nitrogen analysis. As stated 
in recent WRD directives, mercuric chloride should not be 
used, and the statement for preservation of samples for 
nitrogen analysis should be changed to read "Refrigerate at 
4!C."

Additional methods for analysis of organic substances, and 
modifications to methods included in this manual are already 
necessary and are currently being prepared. These additions 
and modifications will be released individually as available.



                       R. J. Pickering
                       Chief, Quality of Water Branch

Attachment

WRD Distribution:
A (Regional Hydrologists only), FO-LS