9 Chromatography columns for laboratory use; laboratory equipment, namely, stands and racks for chromatographic columns; laboratory equipment, namely, apparatus and instruments for chemical analysis, namely, chromatography apparatus for laboratory use, gas chromatography apparatus for laboratory use, liquid chromatography apparatus for laboratory use; apparatus and instruments for electrophoresis and mass spectrometry; Scientific apparatus, namely, spectrometers and parts and fittings therefor; chromatography valve and pump apparatus for laboratory use for gas and liquid chromatography; gas testing instruments; gas testing instruments, namely, gas analysis apparatus; gas mixers for laboratory use; gas chromatography apparatus for laboratory use; constant temperature incubators for laboratory use; Laboratory equipment, namely, laboratory centrifuges, pipettes, capillary tubes, actinometers, vials, gas purifier for gas chromatography, air sampling and testing pumps, dispenser syringes for laboratory use, spectrophotometer cells; chromatography equipment for laboratory use, namely, columns; gas chromatography apparatus for laboratory use; chromatography columns for laboratory use, namely, chromatographic columns for use in chromatographic analysis in the laboratory, chromatography columns for use in chromatographic separation in the laboratory, chromatography columns for use in chromatographic separation for research in the laboratory in the chemical and biotechnology industries; laboratory apparatus and instruments, namely, pre-packed chromatography columns for use in chemical analysis; Laboratory apparatus and instruments for chromatography solid phase extraction