Abstract: A method and apparatus are disclosed for the near simultaneous detection of light emitted from ozone induced chemiluminescence of nitrogen and sulfur species capable of undergoing ozone induced chemiluminescence in a single instrument. A sample containing sulfur and/or nitrogen is first subjected to an oxidative/reductive process which generates ozone reactive nitrogen and sulfur species which are then forwarded to an specially designed ozone/detector chamber. The ozone relative species are brought in contact with ozone in the special chamber and the chemiluminescence of the nitrogen species and the sulfur species are measured and quantitated.

Abstract: A method and apparatus are disclosed for the near simultaneous detection of light emitted from ozone induced chemiluminescence of nitrogen and sulfur species capable of undergoing ozone induced chemiluminescence in a single instrument. A sample containing sulfur and/or nitrogen is first subjected to an oxidative/reductive process which generates ozone reactive nitrogen and sulfur species which are then forwarded to an specially designed ozone/detector chamber. The ozone reactive species are brought in contact with ozone in the special chamber and the chemiluminescence of the nitrogen species and the sulfur species are measured and quantitated.

Abstract: An apparatus and method for interfacing a capillary with a detector is disclosed. In particular, a capillary that is used in a capillary electrophoresis technique is interfaced with an off-column detector that is destructive of the sample or that will otherwise create adverse affects on the operations of the capillary electrophoresis. By way of example only, a nitrogen chemiluminescent detector using pyro-chemiluminescent techniques is discussed. An interface between the separation and detection systems is essential to prevent interference between the two systems. The interface apparatus and method are achieved by creating a closed connection between the two systems within which the pressure and sample flow rate can be controlled. Pressure control is achieved through the introduction and venting of gas into and from the integrated system. Interference between interfaced systems is then prevented by equalizing the pressure in the interface apparatus with the head pressure on the inlet end of the capillary.

Abstract: A method for analyzing total bound nitrogen in a sample and providing an output data of total bound nitrogen and constituent compounds (nitrate and nitrite) is disclosed. The total nitrogen bound method provides a discrete sample through a furnace in the presence of continuous flow of water as carrier as well as oxygen carrier gas, resulting in the oxidation of the nitrogen compounds to nitric oxide. The nitrate method involves a discrete sample with water as a carrier provided to a sparge tank. The nitrite is catalytically reduced to nitric oxide in the presence of tartaric acid and ascorbic acid. The nitrate method involves a first conversion to change the nitrate to a nitrite. The first conversion occurs in the presence of a copper-cadmium catalyst causing the formation of the NO.sub.2. The nitrile is subsequently converted into NO. The nitric oxide produced in each of the three methods is measured in a chemiluminescent nitrogen detector.

Abstract: In the illustrated and preferred embodiment of this disclosure, a chemiluminescent sulfur detector, both method and apparatus, for detecting bonded sulfur in compounds is disclosed. The illustrated and preferred embodiment, being provided with a discrete sample, passes the sample through a first furnace in the presence of a carrier of inert gas and is exposed to a suitable granulated metal oxide, such as copper oxide or vanadium pentoxide, resulting in oxidation of the sulfur compound. The sample is then passed through a second furnace comingled with elemental hydrogen, there being a conversion of sulfur oxides to hydrogen sulfide. The output of the second furnace is dried. The hydrogen sulfide, along with the inert carrier gas, is introduced into a reaction chamber and is mixed with ozone. A chemiluminescent reaction occurs in the chamber, and the resulting light emission is measured photoelectrically by either a photomultiplier tube or photodiode.

Abstract: A method and apparatus for detecting bonded sulfur in compounds where a discrete sample passes through a first furnace in the presence of a carrier of inert gas and is exposed to a suitable granulated metal oxide, such as copper oxide or vanadiam pentoxide, resulting in oxidation of the sulfur compound. The sample is then passed through a second furnace comingled with elemental hydrogen, there being a conversion of sulfer oxides to hydrogen sulfide. The output of the second furnace is dried. The hydrogen sulfide, along with the inert carrier gas, is introduced into a reaction chamber and is mixed with ozone. A chemiluminescent reaction occurs in the chamber, and the resulting light emission is measured photoelectrically by either a photomultiplier tube or photodiode. The output from the photomultiplier tube is connected to a summing circuit, and the summation represents the measure of sulfur in the specimen.

Abstract: In one exemplar embodiment, a chemiluminescent nitrogen detector for detecting chemically-bound nitrogen in an organic compound is provided in which a discrete sample of the organic compound containing the chemically-bound nitrogen is injected into a high temperature furnace where the sample is pyrolyzed at extremely high temperatures in an oxygen rich atmosphere to form nitric oxide. The pyrolysis gases, including nitric oxide is then applied to a drying means for eliminating a substantial quantity of water vapor from the carried pyrolysis gases to insure that the dew point of the gases is below the operating temperature of a nitric oxide and ozone reaction chamber. The nitric oxide and ozone are mixed in a reaction chamber to form metastable nitrogen dioxide which instantaneously relaxes to its ground state with a resulting photo-emission of light energy.