Skip to main content

Determination of Volume Fractions in Multicomponent Mixtures Using Ultrasound Frequency Analysis

Buy Article:

$29.00 plus tax (Refund Policy)

Abstract:

Controlling the composition of mixtures is critical for quality control in a wide variety of applications. There is a need for rapid, on-site measurements to optimize processes in real time. Ultrasound easily penetrates opaque samples and containers, yet currently provides minimal chemical information. We have developed a general approach to determine the volume fraction of a liquid in mixtures with multiple components. Ultrasound waves propagating through a medium undergo distortion processes that are characteristic of the chemical bonding composition. The distortion of the waveform can be measured in the ultrasound frequency profile. An ultrasound pulse-through configuration with matching 5 MHz transducers was used to analyze mixtures of water, methanol, and ethanol. Multilinear regression analysis was used to determine the volume fraction of all components in a series of mixtures. Using this technique, volume fractions were determined simultaneously with correlation coefficients (r 2) greater than 0.98 in two-component mixtures. Determination of volume fractions in three-component mixtures ranging from 65–100% water also showed correlation coefficients of 0.91 for methanol and 0.94 for ethanol. This technique is attractive for process monitoring due to the short measurement time and the simple methodology that excludes sample pretreatment.

Keywords: ALCOHOL; FREQUENCY ANALYSIS; MIXTURES; MULTILINEAR REGRESSION; NONLINEAR PROPAGATION; ULTRASOUND

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/10-06126

Affiliations: 1: Chemistry Department, McGill University, 801 Sherbrooke Street West, Montreal, Québec, Canada, H3A 2K6 2: Chemistry Department, McGill University, 801 Sherbrooke Street West, Montreal, Québec, Canada, H3A 2K6. david.burns@mail.mcgill.ca

Publication date: June 1, 2011

More about this publication?
sas/sas/2011/00000065/00000006/art00016
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more