Abstract: This invention is a method and apparatus for monitoring the concentration of carbon dioxide dissolved in water by means of conductivity. It distinguishes between the conductivity resulting from carbon dioxide and the conductivity resulting from other constituents dissolved in water. It can be used to monitor the quality of demineralized water, boiler feedwater, steam, or condensate in electric power generation and other industrial facilities. It is constructed by adding a column containing weak base anion exchange resin and a conductivity instrument to a typical cation conductivity monitor. A sample of the water to be monitored flows first through a typical cation conductivity monitor, then through a weak base anion exchange column, and then through an additional conductivity instrument.

Abstract: This invention is a device which can be used to obtain a sample of blood from a person or animal. It incorporates parts of two existing devices (syringes and Vacutainers) into one device in a new configuration, and it reduces or eliminates some of the disadvantages of each of these two existing devices. Unlike the typical use of a syringe, a sample of blood is transferred directly from the blood vessel of a person or animal to the test tube or similar container that is sent to a laboratory for testing. Unlike a Vacutainer, the differential pressure between the two ends of a hypodermic needle can be controlled while the device is being used.