Recently

many faults of high voltage electric equipments happened due to the copper sulfide

which was formed by corrosive sulfur in transformer oil reacting with copper windings.Solving this problem has become the main concern for electric departments at present.In this paper

the existing standard test methods and measuring techniques are compared

and some related experiments are performed to verify these methods and techniques.The conclusion can be drawn as follows: when conduct a qualitative analysis of corrosive sulfur in transformer oil

the oxygen content in oil will influence the test results

and paper-wrapped copper wire can help to achieve more accurate results than bare copper wire.HPLC is an effective technique to measure the concentration of dibenzyl disulfide（DBDS） in transformer oil.This study may favor the measurement of corrosive sulfur in transformer oils by electric power enterprises and related manufacturers before putting transformers into operation.