Abstract: An automated distillation system includes a distillation process under vacuum, a sampling device for extracting a vapor sample of distillate, a gas analyzer for measuring a property of the vapor sample, and a controller for analyzing the property and appropriately adjusting one or more parameters of the system, such as a level of vacuum, in response to the analysis.

Abstract: A flat spiral microfabricated gas chromatography column is formed by etching a spiral channel into a planar substrate and bonding additional substrates to each side thereof. Holes or vias in these substrates form an entrance and an exit to the spiral channel etched in the middle substrate. More than one spiral may be etched into a substrate and more than one entrance and exit may be etched into the top and bottom substrates to provide an entrance and an exit to the spiral channel. The spiral channel may have an etched width that is wider than the substrate is thick. In this fashion, a high aspect ratio column is formed with the channel width defining the long dimension of the high aspect ratio column and the thickness of the substrate defining the short dimension of the high aspect ratio column.

Abstract: An automated distillation system includes a distillation process under vacuum, a sampling device for extracting a vapor sample of distillate, a gas analyzer for measuring a property of the vapor sample, and a controller for analyzing the property and appropriately adjusting one or more parameters of the system, such as a level of vacuum, in response to the analysis.

Abstract: The present invention relates to a process for the production of polyethylene hollow articles, which process comprises charging the polyethylene with one or more NO-acyl hindered amine additives containing one or more groups of formula (I), filling this mixture into a mold, heating this mold in an oven to above 280° C., such that the additized polyethylene melts, rotating the mold around at least 2 axes, the additized polyethylene spreading to the walls, cooling the mold while still rotating, opening it, and taking the resultant hollow article out, where the group of formula (I) is where Ra is a monoacyl or diacyl radical; R1-R4 are each C1-C6alkyl; and R5 and R6 are each, independently of one another, hydrogen, C1-C6alkyl or C6-C10aryl; or R5 and R6 are together oxygen.

Abstract: The present invention relates to a process for the production of polyethylene hollow articles, which process comprises charging the polyethylene with one or more NO-acyl hindered amine additives containing one or more groups of formula (I), filling this mixture into a mold, heating this mold in an oven to above 280° C., such that the additized polyethylene melts, rotating the mold around at least 2 axes, the additized polyethylene spreading to the walls, cooling the mold while still rotating, opening it, and taking the resultant hollow article out, where the group of formula (I) is where Ra is a monoacyl or diacyl radical; R1-R4 are each C1-C6alkyl; and R5 and R6 are each, independently of one another, hydrogen, C1-C6alkyl or C6-C10aryl; or R5 and R6 are together oxygen.

Abstract: The present invention can be generally described as a vapor detection instrument testing system and testing process. This testing system integrates a computing system loaded with testing software, and a test-substance generating device. The present device is portable and provides a user with the ability to perform vapor detection instrument testing at the field side of the vapor detection instrument. The portability of the vapor detection instrument testing system results in more frequent instrument testing and less detection instrument down time.