Apparatus and methods for monitoring the concentrations of hazardous airborne substances, especially lead
Abstract
Air is sampled at a rate in excess of 100 L/min, preferably at 200-300 L/min, so as to collect therefrom a substantial fraction, i.e., at least 20%, preferably 60-100%, of airborne particulates. A substance of interest (analyte), such as lead, is rapidly solubilized from the the collected particulates into a sample of liquid extractant, and the concentration of the analyte in the extractant sample is determined. The high-rate air sampling and particulate collection may be effected with a high-throughput filter cartridge or with a recently developed portable high-throughput liquid-absorption air sampler. Rapid solubilization of lead is achieved by a liquid extractant comprising 0.1-1 M of acetic acid or acetate, preferably at a pH of 5 or less and preferably with inclusion of 1-10% of hydrogen peroxide. Rapid determination of the lead content in the liquid extractant may be effected with a colorimetric or an electroanalytical analyzer.
- Inventors:
- Issue Date:
- Research Org.:
- ~Individually Owned Patent
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1174943
- Patent Number(s):
- 6762060
- Application Number:
- 08/377,966
- Assignee:
- Zaromb, Solomon
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- DOE Contract Number:
- W-31-109-ENG-38
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Zaromb, Solomon. Apparatus and methods for monitoring the concentrations of hazardous airborne substances, especially lead. United States: N. p., 2004.
Web.
Zaromb, Solomon. Apparatus and methods for monitoring the concentrations of hazardous airborne substances, especially lead. United States.
Zaromb, Solomon. Tue .
"Apparatus and methods for monitoring the concentrations of hazardous airborne substances, especially lead". United States. https://www.osti.gov/servlets/purl/1174943.
@article{osti_1174943,
title = {Apparatus and methods for monitoring the concentrations of hazardous airborne substances, especially lead},
author = {Zaromb, Solomon},
abstractNote = {Air is sampled at a rate in excess of 100 L/min, preferably at 200-300 L/min, so as to collect therefrom a substantial fraction, i.e., at least 20%, preferably 60-100%, of airborne particulates. A substance of interest (analyte), such as lead, is rapidly solubilized from the the collected particulates into a sample of liquid extractant, and the concentration of the analyte in the extractant sample is determined. The high-rate air sampling and particulate collection may be effected with a high-throughput filter cartridge or with a recently developed portable high-throughput liquid-absorption air sampler. Rapid solubilization of lead is achieved by a liquid extractant comprising 0.1-1 M of acetic acid or acetate, preferably at a pH of 5 or less and preferably with inclusion of 1-10% of hydrogen peroxide. Rapid determination of the lead content in the liquid extractant may be effected with a colorimetric or an electroanalytical analyzer.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 13 00:00:00 EDT 2004},
month = {Tue Jul 13 00:00:00 EDT 2004}
}
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