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- Title
Determination of 2-Acetyl-1-pyrroline via a Color-Change Reaction Using Chromium Hexacarbonyl.
- Authors
Bennett, Chonlada; Sriyotai, Woraprapa; Wiratchan, Sirakorn; Semakul, Natthawat; Mahatheeranont, Sugunya
- Abstract
At present, there is no colorimetric method for the quantitation of the aroma compound 2-acetyl-1-pyrroline (2AP). A novel colorimetric method was developed for the determination of 2AP content using chromium hexacarbonyl (Cr(CO)6) as a reagent. The reaction of synthetic 2AP with chromium hexacarbonyl reagent solution in the presence of light produced a green product with an absorption maximum (λmax) at 623 nm. GC–MS was used to confirm the color-change reaction, which showed the loss of 2AP after the addition of Cr(CO)6. This novel method enables facile and cost-effective determination of 2AP in fragrant rice. A comparative analysis of fragrant and nonfragrant rice grain extracts showed that no color-change reaction occurred with the nonfragrant rice sample. A limit of detection (LOD) of 2.00 mg L−1 was determined by method validation with an effective linear concentration ranging from 5.00 to 60.00 mg L−1 of 2AP. The results obtained using the developed colorimetric method were consistent with those obtained by automated static headspace gas chromatography with nitrogen-phosphorus detection (SHS-GC–NPD).
- Subjects
CHROMIUM; GAS chromatography; GREEN products; DETECTION limit; GAS chromatography/Mass spectrometry (GC-MS)
- Publication
Molecules, 2022, Vol 27, Issue 12, p3957
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules27123957