Patent ID: 8555700
Filing Date: 2013-10-15
Classification: B01D,G01N

Abstract:
1. A method of analytical gravimetric weighing using a particulate filter comprising the steps of: equilibrating a circular particulate filter with a circular periphery and a non-hygroscopic support ring comprising a filter membrane comprising a fluoropolymer to an ambient pre-test environment; identifying the particulate filter by scanning an identification symbol pre-printed on a first and a second side directly on the filter membrane of the particulate filter; dissipating electrostatic charge buildup on the particulate filter; pre-weighing the particulate filter; conducting a testing application using the particulate filter; equilibrating the particulate filter to an ambient post-test environment; identifying the particulate filter by the identification symbol pre-printed on a clean side of the particulate filter media by scanning the identification symbol; post-weighing the particulate filter; and determining a net load of particulate collected by the particulate filter in the testing application based upon the pre-weighing and the post-weighing.