A method for capturing PSA and its molecular forms that may be in a fluid biological material including the steps of: preparing a chromatographic column by placing a thiophilic gel in a column where the thiophilic gel is formed from a water insoluble polymer where the surface of the gel is provided with...http://www.google.com.au/patents/US6379550?utm_source=gb-gplus-sharePatent US6379550 - Method for detecting PSA and its molecular forms using thiophilic gel