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Technical Articles2022-03-04T06:18:50+00:00
804, 2022

On-road tailpipe emission characteristics and ozone formation potentials of VOCs from gasoline, diesel and liquefied petroleum gas fueled vehicles

On-road tailpipe emission characteristics and ozone formation potentials of VOCs from gasoline, diesel and liquefied petroleum gas fueled vehicles Download PDF Version HIGHLIGHTS VOCs from various types of vehicles were investigated systematically with the PEMS. Aromatics and alkanes were the dominant VOC groups from in-use vehicle exhaust. Aromatics were the major contributors of the total

403, 2022

Nutech 3000 THC & NMHC Analyzer Application Note for Wastewater VOCs Testing in San Francisco

Background Introduction This application note is provided by Cambrian Innovation, the leading wastewater treatment solution provider in US. They built a plant to help Anchor Brewing, one of the oldest beer producer in US,  to deal with their wastewater and make sure that after their treatment, the wastewater's NMHC concentration should be within allowable limit. Cambrian used our

1410, 2021

Analysis of 117 VOCs Compounds by Using Nutech 8910 Preconcentrator System

Application Note: Analysis of 117 VOCs Compounds by Using Nutech 8910 Preconcentrator System 【Abstract】 By Using three stage cryogenic system + GC/MS technology (Full Scan and/or SIM) 117 VOC compounds (TO15 + PAMS + Aldehyde Compounds Mix by Linde) in air be analyzed to check the 8910 instrument performance. The results shows that in 0.1-10.0ppb range, the calibration, precision,

1805, 2021

Application Note: A Fast Run for EPA TO-15A by Using Nutech 8910 Preconcentrator System

Application Note: A Fast Run for EPA TO-15A by Using Nutech 8910 Preconcentrator System 【Abstract】 By Using three stage cryogenic system + GC/MS technology (Full Scan and/or SIM) 82 VOC compounds (TO15A Mix by Linde) in air be analyzed in a fast single run performance. The results shows that in 0.1-20.0ppb range the calibration, precision, accuracy, blank and

2704, 2021

Application Note by Using Nutech Preconcentrator System for EPA TO-15A Lab Analysis

Application Note by Using Nutech Preconcentrator System for EPA TO-15A Lab Analysis 【Abstract】 By Using three stage cryogenic system + GC/MS technology (Full Scan and/or SIM) 82 VOC compounds (TO15A Mix by Linde) in air was analyzed in a single run. The results show that in 0.5-10.0ppb range the calibration, precision, accuracy, blank and MDL etc. are all

1003, 2021

Study of VOC and Photochemical Ozone Pollution in the Pearl River Delta Region

Study of VOC and Photochemical Ozone Pollution in the Pearl River Delta Region   1 INTRODUCTION 1.1 Background 1.1.1 The rapid economic development in the Pearl River Delta (PRD) Region including Hong Kong Special Administrative Region over the past decade has resulted in changes in the nature of air pollutants emitted from various activities in the region. There has

403, 2021

US EPA Method TO-15 VS US EPA Method TO-14A

US EPA Method TO-15 VS US EPA Method TO-14A Compendium Method TO-15 is significant in that it extends the Compendium Method TO-14A description for using canister-based sampling and gas chromatographic analysis in the following ways: • Compendium Method TO-15 incorporates a multisorbent/dry purge technique or equivalent (see Appendix A) for water management thereby addressing a more extensive set of

1311, 2020

Releases of Fire-Derived Contaminants from Water Pipes Made of Polyvinyl Chloride Polymer

Abstract: In order to assess the human exposure risks from the release of contaminants from water pipes made of polyvinyl chloride (PVC), experiments were carried out by subjecting the PVC pipe material to burning and leaching conditions followed by analysis of the emission and leachate samples. The emissions of burning pipes were analyzed by both infrared spectrometry and gas

2709, 2020

Storage Stability of 66 Volatile Organic Compounds (VOCs) in Silicon-Lined Air Canisters for 30 Days

Storage Stability of 66 Volatile Organic Compounds (VOCs) in Silicon-Lined Air Canisters for 30 Days Abstract The recoveries of 66 volatile organic compounds (VOCs) typically analyzed as part of the United States (U.S.) Environmental Protection Agency’s (EPA’s) Compendium Method TO-15, were evaluated for two commercially available silicon-lined (SL) air canisters. The VOC recoveries were determined both in dry (0%

2509, 2020

Control of VOCs Emissions by Condenser Pre-treatment in a Semiconductor Fab

Control of VOCs Emissions by Condenser Pre-treatment in a Semiconductor Fab   Abstract The performance of a modified design of local condensers to pre-treat a variety of volatile organic compounds (VOCs) emitted from the stripping process of a semiconductor fab was tested in this study. The reaction temperature of the condensers was controlled at around 10 ◦C, it is

2509, 2020

Whole Air Canister Sampling and Preconcentration GC-MS Analysis for pptv Levels of Trimethylsilanol in Semiconductor Cleanroom Air

Whole Air Canister Sampling and Preconcentration GC-MS Analysis for pptv Levels of Trimethylsilanol in Semiconductor Cleanroom Air   Abstract The costly damage trimethylsilanol (TMS) in cleanrooms exacts on scanner lenses in the semiconductor industry has resulted in the demand for accurate and reliable methods for measuring TMS at trace levels (i.e., parts-per-trillion, volume-per-volume of air [pptv] [~ng/m3]. This study

2209, 2020

Rapid Determination of TO-15 Volatile Organic Compounds (VOCs) in Air

Rapid Determination of TO-15 Volatile Organic Compounds (VOCs) in Air Abstract The following study evaluated the efficacy of using Nutech’s 8900DS preconcentrator in combination with an analytical system based on a 30 m x 0.32 mm x 1.00 µm Rxi-5Sil MS column for analysis of VOCs in whole air. Results were assessed based on five criteria outlined for time-integrated,

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