42 providing biological, environmental, biochemical, and chemical sample testing for others through the performance of assays in the fields of scientific and clinical research; all of the foregoing solely for use with biological, biochemical, and chemical electrochemiluminescence-based analyzers, reagents, cartridges, multi-well plates, and kits for use in performing assays, selection, screening, testing, imaging and diagnostics of biological, biochemical, environmental and chemical samples; all of the foregoing excluding mass spectrometers, mass selective detectors, detectors for use with chromatographs, and goods or services for use with mass spectrometers, mass selective detectors and detectors for use with chromatographs