Abstract: A liquid chromatograph comprising a column coupled to a microring resonator array and methods of using the same are disclosed. The microring resonator array measures the bulk refractive index of the mobile phase and any sample injected onto and separated in the column. While carrying out the methods, the composition of a mobile phase passing through the chromatography column may remain substantially constant (isocratic elution) or it may vary (gradient elution). One or more microrings may comprise a covering to act as a thermal control. In addition, the sensor surface may be modified with some type of capture agent that can interact with one or more components in the sample.

Abstract: A liquid chromatograph comprising a column coupled to a microring resonator array and methods of using the same are disclosed. The microring resonator array measures the bulk refractive index of the mobile phase and any sample injected onto and separated in the column. While carrying out the methods, the composition of a mobile phase passing through the chromatography column may remain substantially constant (isocratic elution) or it may vary (gradient elution). One or more microrings may comprise a covering to act as a thermal control. In addition, the sensor surface may be modified with some type of capture agent that can interact with one or more components in the sample.

Abstract: Apparatus for testing can lids or other discrete articles for leaks includes a conveyor belt having a plurality of grommets attached thereto. The articles to be tested are placed on the grommets and tested for leaks by applying a pressurized gas to one side of the articles while applying a vacuum to the other side of the articles. A detector detects the flow of a gaseous fluid through the discrete articles as a result of the vacuum application or as a result of the combined application of vacuum and pressurized gas.

Abstract: A system for detecting leaks in pasteurization plates and the like wherein the plate forms a chamber with a support surface and a gasket, a vacuum is formed in the chamber, and leaks in the plate detected by passing a gas through the plate and sensing the presence of said gas in the chamber.