A vacuum assembly module mountable to a work machine attachment for providing dust-reducing capabilities is provided. This can be achieved by providing one or more electrode surfaces coated with a dielectric material having a reactive impedance of less than 3,000 ohmssq. The apparatus is also effective when used in conjunction with a liquid mobile phase heater such as those provided by an HPLC column compartment or a metal capillary of sufficient length to heat the liquid mobile phase. The invention farther relates to drug-screening methods using the polypeptides and polynucleotides to identify agonists and antagonists for diagnosis and treatment. The present invention has advantages in SOP measurement of wide wavelength range, increasing the measurement accuracy. A temperature sensor monitors the temperature of the compartment.