Determination of chromium and manganesein steel using digital photometry of solutions

Issue Date

12-2015

Abstract

The chromium and manganese contents of a steel sample were determined using digital photometric analysis. Digital still photographs of dichromate and permanganate solutions were taken using 10-megapixel (MP) and 12-MP digital cameras. RGB values were determined using the RGB Analysis of Image Colors and SI ColorPicker which are free-access software. G-B and a*-b* plots were constructed in order to calculate the analyte concentrations, which were then compared with those obtained by conventional spectrophotometric analysis. The concentrations obtained with the two digital cameras showed no significant differences at 95% confidence level from those calculated based on RGB values using the two software. Use of G-B plots resulted in greater accuracy than a*-b* plots for calculating chromium and manganese concentrations. Digital photometry (color image processing) was found to be reproducible and accurate and is a cheaper alternative to conventional spectrophotometry for determining the chromium and manganese contents of steel.

Source or Periodical Title

Philippine Journal of Science

ISSN

0031-7683

Volume

144

Issue

2

Page

117-127

Document Type

Article

Physical Description

tables, graphs

Language

English

Subject

Chromium determination, Digital photometry, Manganese determination, Steel analysis

Digital Copy

yes

Link to Full Text

Share

COinS