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Techniques for Online Determination of VOCs in Water (.pdf)
of results. Application #1 is the measurement of ppb. levels of benzene in presence of hundreds. of ppm of IPA and acetone- batch. process; no lab or additional personnel. wanted and application #2 is the measurement of ppb levels of non polar VOC's and/also. alcohols (polar) in waste stream; 2 shifts. 7
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Analysis of Impurities in Polymer-grade Ethylene, Propylene and 1,3-Butadiene
Take as a case study the detection of one impurity: arsine in. olefins. Even at low ppb levels, arsine can adversely affect. certain polymerization catalyst properties and also lead to. polymer contamination. ./54c40003-e627-4044-9e9d-4f14fa44b150 00. MEASUREMENT AND TESTING. Analysis
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The On-Line Detection of Oxides of Nitrogen in Light Hydrocarbon Streams
. C.I. Analytics has solved this analytical problem using two. change color in proportion to the amount of gas: the higher the. difficult, even though, in some labs, good results at 50 PPB level. different detectors. One is Dry Colorimetery Detector and the other. target gas concentration, the darker
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Measuring and removing dissolved and colloidal silica in ultrapure water
potential of colloidal silica, one study reports that 1 ppb by weight of colloidal silica equals 100 million 20-nm-diam particles per milliliter. Measuring Silica in Ultrapure Water The amount of reactive and unreactive silica in UP water can be determined by various analytical methods, including
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Vegetable Oil Refining
through the extra heating process while low chlorophyll concentrated oil moves into the bleaching process. Optek dual channel colorimeters are capable of measuring chlorophyll concentrations < 30 ppb (parts per billion), all real-time and inline with high precision and repeatability. Bleaching
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MICRO:Process Equipment-Lithography, by Zhou Lin (Feb 99)
and ammonia in parts-per-billion concentrations, which poison chemically amplified deep-ultraviolet (DUV) photoresists. Other researchers have reported that when a chemically amplified photoresist was exposed to a 17% ppb concentration of ammonia for 10 minutes, there was an ~20% change in linewidth
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INDUSTRY NEWS
levels of 10 ppb and 1 ppb. MicroHome | Search | Current Issue | MicroArchives Buyers Guide | Media Kit Questions/comments about MICRO Magazine? E-mail us at cheynman@gmail.com. (C) 2007 Tom Cheyney All rights reserved.
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MICRO: Industry News: Expansions and Acquisitions (October 2000)
. Situated in Cleburne, TX, the site will produce the company's line of UltraOx gas containing 99.99999% oxygen with nitrogen at 10-ppb levels. Demand for the UltraOx gas has risen significantly, Air Liquide says. A primary use is growth of silicon oxide. The product is also used to prevent silicon