Abstract: A method of applying color to a woven carpet product includes positioning a woven carpet within a dyeing system. The woven carpet includes at least two types of yarn configured to retain a dye. At least one of the two types of yarn has a first dye affinity and another of the two types of yarn has a second dye affinity. A dye is applied to the at least two types of yarn included within the woven carpet via the dyeing system.

Abstract: A method of analysis by high performance liquid chromatography is provided for obtaining an analysis of three components, namely acyclic paraffins, cycloparaffins and unsaturates, present in a liquid hydrocarbon mixture. The method comprises introducing a sample of the mixture to be analyzed into an unsaturates-selective column, passing the eluents from the unsaturates-selective column to a second column, eluting the separated components from the second column, detecting the presence of paraffins and naphthenes in the effluent from the second column, eluting the separated components from the unsaturates-selective column, and detecting the presence of unsaturates in the effluent from the unsaturates-selective column. The unsaturates-selective column is a silver-modified ion exchange column. The second column is a slurry packed column packed with a microparticulate material. The detector is a dielectric constant detector.

Abstract: This invention concerns analysis by high performance liquid chromatography HPLC) of crude oils and petroleum products.In one embodiment of the invention a sample is quantitatively separated into saturates, alkyl benzenes and polynuclear aromatics using a system comprising a column packed with a porous silica packing material having a polar amino-cyano bonded phase in tandem with a column packed with a tetranitrofluorenimino packing material, and a dielectric constant detector.In another embodiment of the invention a sample is qualitatively separated into saturates, olefins, and total aromatics using a system employing an olefin-selective column and a dielectric constant detector.

Abstract: This invention concerns analysis by high performance liquid chromatography (HPLC) of crude oils and petroleum products.In one embodiment of the invention a sample is quantitatively separated into saturates, alkyl benzenes and polynuclear aromatics using a system comprising a column packed with a porous silica packing material having a polar amino-cyano bonded phase in tandem with a column packed with a tetranitrofluorenimino packing material, and a dielectric constant detector.In another embodiment of the invention a sample is qualitatively separated into saturates, olefins, and total aromatics using a system employing an olefin-selective column and a dielectric constant detector.