Immunoassay (ia) and liquid chromatography/tandem mass. Medtox offers a wide variety of test panels that can be customized to meet your company’s needs. In addition to traditional drugs of abuse,. Webthis compendium is intended as a resource for clients ordering drug testing and includes assays performed at labcorp as well as specialized testing from medtox laboratories. I even spread a small bit of urine around the top edge of the specimen cup. But she didn't smell test it.