Measurements of aerosol particle size: Improved precision by simultaneous use of optical particle counter and nephelometer

Christine S. Sloane; Mark J. Rood; C. Fred Rogers

doi:10.1080/02786829108959491

Measurements of aerosol particle size: Improved precision by simultaneous use of optical particle counter and nephelometer

Christine S. Sloane, Mark J. Rood, C. Fred Rogers

Research output: Contribution to journal › Article › peer-review

Abstract

Improved accuracy and precision in size measurements of submicrometer volatile particles are achieved by reconciling simultaneous measurements by optical particle counter (OPC) and nephelometer. Reconciliation of data obtained from the two instruments required a careful calibration and measurement of relative humidity in both instruments. Correspondence between the nephelometer response and that calculated from the OPC size distribution provides a standard that limits uncertainty and inaccuracy in the OPC size measurement. This approach is demonstrated for size measurements of volatile submicrometer aqueous NaCl droplets, for which a least-squares regression of the data provided a 0.95 correlation coefficient. The quantitative reconciliation of the two optical measurements provides an experimental test of their accuracy.

Original language	English (US)
Pages (from-to)	289-301
Number of pages	13
Journal	Aerosol Science and Technology
Volume	14
Issue number	3
DOIs	https://doi.org/10.1080/02786829108959491
State	Published - Jan 1 1991
Externally published	Yes

ASJC Scopus subject areas

Environmental Chemistry
Materials Science(all)
Pollution

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10.1080/02786829108959491

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title = "Measurements of aerosol particle size: Improved precision by simultaneous use of optical particle counter and nephelometer",

abstract = "Improved accuracy and precision in size measurements of submicrometer volatile particles are achieved by reconciling simultaneous measurements by optical particle counter (OPC) and nephelometer. Reconciliation of data obtained from the two instruments required a careful calibration and measurement of relative humidity in both instruments. Correspondence between the nephelometer response and that calculated from the OPC size distribution provides a standard that limits uncertainty and inaccuracy in the OPC size measurement. This approach is demonstrated for size measurements of volatile submicrometer aqueous NaCl droplets, for which a least-squares regression of the data provided a 0.95 correlation coefficient. The quantitative reconciliation of the two optical measurements provides an experimental test of their accuracy.",

author = "Sloane, {Christine S.} and Rood, {Mark J.} and Rogers, {C. Fred}",

note = "Funding Information: M. J. Rood acknowledges that, although information described in this article has been partially funded by the U.S.",

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doi = "10.1080/02786829108959491",

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T1 - Measurements of aerosol particle size

T2 - Improved precision by simultaneous use of optical particle counter and nephelometer

AU - Sloane, Christine S.

AU - Rood, Mark J.

AU - Rogers, C. Fred

N1 - Funding Information: M. J. Rood acknowledges that, although information described in this article has been partially funded by the U.S.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - Improved accuracy and precision in size measurements of submicrometer volatile particles are achieved by reconciling simultaneous measurements by optical particle counter (OPC) and nephelometer. Reconciliation of data obtained from the two instruments required a careful calibration and measurement of relative humidity in both instruments. Correspondence between the nephelometer response and that calculated from the OPC size distribution provides a standard that limits uncertainty and inaccuracy in the OPC size measurement. This approach is demonstrated for size measurements of volatile submicrometer aqueous NaCl droplets, for which a least-squares regression of the data provided a 0.95 correlation coefficient. The quantitative reconciliation of the two optical measurements provides an experimental test of their accuracy.

AB - Improved accuracy and precision in size measurements of submicrometer volatile particles are achieved by reconciling simultaneous measurements by optical particle counter (OPC) and nephelometer. Reconciliation of data obtained from the two instruments required a careful calibration and measurement of relative humidity in both instruments. Correspondence between the nephelometer response and that calculated from the OPC size distribution provides a standard that limits uncertainty and inaccuracy in the OPC size measurement. This approach is demonstrated for size measurements of volatile submicrometer aqueous NaCl droplets, for which a least-squares regression of the data provided a 0.95 correlation coefficient. The quantitative reconciliation of the two optical measurements provides an experimental test of their accuracy.

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Measurements of aerosol particle size: Improved precision by simultaneous use of optical particle counter and nephelometer

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