Preparation and certification of multicomponent VOC compressed gas standards for USEPA Method TO-14

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:621347

Benson, M S; Behm, P E ^[1]

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1. Air Products and Chemicals, Inc., Tamaqua, PA (United States)

Title III of the Clean Air Act amendments (CAAA) of 1990 regulated 189 Hazardous Air Pollutants (HAPs) of which there are > 100 volatile organic compounds (VOCs). The USEPA in Compendium Method TO-14 (Toxic Organics) describes the use of nominal 10 ppmv multicomponent VOC compressed gas standards with a dynamic dilution device to produce ppb-level mixes for analytical system calibration, testing of canister sampling systems and preparing canister transfer standards. Although Method TO-14 specifies the use of NIST traceable gas standards, in actuality the number of VOC-containing Standard Reference Materials (SRMs) available from the National Institute of Standards and Technology (NIST) is limited both in the number of components and the concentration range. Obviously reliable analytical measurements of these hazardous toxic organic compounds in ambient air require the availability of accurate, stable, multicomponent gas standards. The paper will describe methodology for the gravimetric preparation and analytical evaluation of multicomponent VOC compressed gas standards in the low ppm (1-10 ppm) range. 7 refs., 3 figs.

• OSTI ID: 621347
• Report Number(s): CONF-960273--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
GRAVIMETRIC ANALYSIS
ORGANIC COMPOUNDS
SAMPLE PREPARATION
TOXIC MATERIALS
VOLATILE MATTER