Volatile organic compound identification and characterization by PCA and mapping at a high-technology science park.

Volatile organic compound identification and characterization by PCA and mapping at a high-technology science park.

Environmental pollution (Barking, Essex : 1987) (2014-07-16)

Cheng-Hang Lan, Yu-Li Huang, Sheng-Huei Ho, Chiung-Yu Peng

ABSTRACT

High-technology industries have grown continuously in Taiwan and elsewhere in the world. Volatile organic compounds (VOCs) comprise the highest percentage of emissions in these industries. The objectives of this study were to identify VOC sources and to apportion their contributions by using a three-step approach. These included estimating concentration distributions, performing principal component analysis (PCA), and mapping concentration contours. The results showed that the dominant compound groups were aromatic and aliphatic compounds. The PCA resolved four emission sources: vehicular traffic, industrial solvents, waste water plants, and cleaning/degreasing agents. Spatial distributions showed that concentrations of vehicular traffic-related compounds (benzene and isooctane) were highest at the entrances to the science park, and strongly related to traffic volume, and that the emissions of industry-related compounds (xylene and ethylbenzene) were closest to the associated sources. This study provided an accurate, practical and efficient method of characterizing emission sources in an industrial complex.

MATERIALS

Product Number

Brand

Product Description

710725

Sigma-Aldrich

Ethylbenzene solution, NMR reference standard, 5% in chloroform-d (99.8 atom % D), TMS 1 %, NMR tube size 5 mm × 7 in.

736198

Supelco

Ethylbenzene solution, NMR reference standard, 10% in chloroform-d (99.8 atom % D), NMR tube size 5 mm × 8 in. , ultra-thin wall

733768

Sigma-Aldrich

Ethylbenzene solution, NMR reference standard, 10% in chloroform-d (99.8 atom % D), NMR tube size 10 mm × 8 in.

717967

Sigma-Aldrich

Ethylbenzene solution, NMR reference standard, 0.1% in chloroform-d (99.8 atom % D), TMS 0.1 %

717959

Sigma-Aldrich

Ethylbenzene solution, NMR reference standard, 1% in chloroform-d (99.8 atom % D)

708046

Sigma-Aldrich

Ethylbenzene solution, NMR reference standard, 10% in chloroform-d (99.8 atom % D)

708054

Sigma-Aldrich

Ethylbenzene solution, NMR reference standard, 0.1% in chloroform-d ("100%", 99.96 atom % D)

487104

Supelco

Ethylbenzene solution, NMR reference standard, 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 5 mm × 8 in.

487120

Sigma-Aldrich

Ethylbenzene solution, NMR reference standard, 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 8 mm × 8 in.

612480

Supelco

Ethylbenzene solution, NMR reference standard, 0.1% in chloroform-d (99.8 atom % D), chromium(III) acetylacetonate 0.1 mg/mL, TMS 0.01 %, NMR tube size 5 mm × 8 in.

612065

Sigma-Aldrich

Ethylbenzene solution, NMR reference standard, 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 10 mm × 8 in.

714917

Sigma-Aldrich

Ethylbenzene solution, NMR reference standard, 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 5 mm × 8 in. , ultra-thin wall

551341

Sigma-Aldrich

Ethylbenzene solution, NMR reference standard, 5% in chloroform-d (99.8 atom % D), TMS 2 %, NMR tube size 5 mm × 8 in.

03-0870

Sigma-Aldrich

Benzene, JIS 300, ≥99.5%, for residue analysis