  We have done a detailed abundance analysis of four unexplored candidate post-
Asymptotic Giant Branch(AGB) stars IRAS 13110 - 6629, IRAS 17579 - 3121, IRAS
18321 - 1401 and IRAS 18489 - 0629 using high resolution spectra. We have
constructed Spectral Energy Distributions (SED) for these objects using the
existing photometric data combined with infrared (IR) fluxes. For all sample
stars, the SEDs exhibit double peaked energy distribution with well separated
IR peaks showing the presence of dusty circumstellar material. The CNO
abundances indicate the production of N via CN cycling, but observed [C/Fe]
indicates the mixing of carbon produced by He burning by third dredge up
although C/O ratio remains less that 1. A moderate DG effect is clearly seen
for IRAS 18489 - 0629 and IRAS 17579 - 3121 while a large scatter observed in
depletion plots for IRAS 18321 - 1401 and IRAS 13110 - 6629 indicate the
presence of other processes affecting the observed abundance pattern.
