Detection of opiates in urine: a cost-effective low risk immunoassay procedure

A cost-effective immunoassay for the detection of opiates in urine has been developed using commercial reagents on a centrifugal analyser. Using this method it is possible to assay up to 2470 samples with a 100 test kit while maintaining good precision. A mean CV of 4.2% was obtained for the concentration range 123-573 micrograms/l. The assay is suitable for high-risk urines since rigorous heat treatment may be performed prior to analysis.