9 [Apparatus and instruments for scientific laboratory research use in the chemical and biochemical fields;, namely, chromatography instruments and hardware, namely, chromatography columns, gas purifiers, valves, connections, adaptors, tubes, tools, gas purifiers, degassing equipment, solvent recovery equipment, pressure gauges, and laboratory timers and clocks;] laboratory supplies, namely, chemical filters[, filter cartridges, ]laboratory glassware, chemical vials, tube holders, laboratory containers, sample extraction tubes, sample extraction manifold, laboratory tools for handling samples and adjusting laboratory instruments, and sample agitators[; air monitoring instruments and supplies, namely, air sampling pumps, air sampling tubes, and air sampling filters and filter cartridges]