Abstract
A sequential injection analysis method using spectrophotometric detection has been developed for the determination of ethanol in spirit samples. Low-cost reagents (0.2M potassium dichromate and 4M sulphuric acid) are used, and reagent usage is minimal (200μl per analysis). The system is fully automated using software written in LabVIEW™. The method is linear up to 6% (v/v) (R2=0.9995) with a detection limit of 0.09% (v/v). RSDs (n=10) are <1% in the range 1-6% (v/v) and the sample throughput is 19samplesh -1. Measured results for commercial spirit samples were in excellent agreement with their advertised ethanol strengths.
Original language | English |
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Pages (from-to) | 123-128 |
Number of pages | 6 |
Journal | Analytica Chimica Acta |
Volume | 499 |
Issue number | 1-2 |
Early online date | 3 Oct 2003 |
DOIs | |
Publication status | Published - 4 Dec 2003 |
Keywords
- Alcohol
- Distilled liquors
- Ethanol
- Potassium dichromate
- Sequential injection analysis
- Spectrophotometry
- Spirits
ASJC Scopus subject areas
- Analytical Chemistry
- Biochemistry
- Environmental Chemistry
- Spectroscopy