Determination of binary formation constants by pH-metry (Irving and Rossotti method):http://notesgoogleblog.blogspot.in/2014/11/blog-post.html

See next => http://notesgoogleblog.blogspot.in/2014/11/blog-post.html

Click for other methods 
http://web.mst.edu/~tbone/Subjects/TBone/Datasheet.pdf

http://pac.iupac.org/publications/pac/pdf/1982/pdf/5412x2675.pdf