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Title: 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):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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 = {2004},
month = {7}
}

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Works referenced in this record:

Differential pulse anodic stripping voltammetry in a thin-layer electrochemical cell
journal, December 1976


Computer automation of anodic stripping voltammetry with a mercury film wall-jet electrode
journal, May 1985


The formation and properties of mixed lead sulfide—silver sulfide membranes for lead(II)-selective electrodes
journal, September 1978