[vamsikrishna]

W. P. Jencks, J. Am. Chem. Soc., 1972, 94, 4731

Can someone please kindly provide me the above mentioned article. Can someone kindly provide the mechanism for detritylation using catalyst sodium bisulphite.

[AWK]

Trityl is removed in acidic conditions. pH of NaHSO₃ is about 4.5. May be this is a simple acid catalysis (if works).

[sjb]

Looking at the front page, http://pubs.acs.org/doi/pdf/10.1021/ja00768a052 I would concur with AWK

[AWK]

Trityl is used for protection of -OH and -NH₂ groups but this information is missing in post of
vamsikrishna.
In link given to one of Jenks 2 pages publication (from series) general consideration on acid-base catalysis are given. From the first page of Jenks reference vamsikrishna can can discuss his/her case, we only can guess.
Deprotection of group consists of two steps: catalysis and reaction. The reaction can be modified or facilitated by solvent and reagent used for deprotection.