RT Journal Article SR Electronic T1 Interference from the presence of other substances in detecting and determining barbiturates in biological material JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 291 OP 295 DO 10.1136/jcp.22.3.291 VO 22 IS 3 A1 S. L. Tompsett YR 1969 UL http://jcp.bmj.com/content/22/3/291.abstract AB Investigations of the interference by other substances in the detection and determination of barbiturates in biological materials are described.