Methods in Enzymolgy has published several articles on buffers over the years.
One handy and comparatively recent reference is:
<http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B7CV2-4B5XNYK-1Y6&_user=793831&_coverDate=12%2F31%2F1990&_alid=770205041&_rdoc=10&_fmt=high&_orig=mlkt&_cdi=18066&_sort=v&_st=17&_docanchor=&view=c&_ct=9322&_acct=C000025978&_version=1&_urlVersion=0&_userid=793831&md5=8dd7d599224e9954baa83ef75c6424ec>Buffers:
Principles and practice
Methods in Enzymology, Volume 182, 1990, Pages 24-38 by Vincent S. Stoll and
John S. Blanchard
If some one can not access the article for personal use, and others don't
object to the copyright I will be very happy to share it.
Biswajit Pal
CCMB, India