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| Titel: |
Flow-through spectrophotometric sensor for the determination of saccharin in low-calorie products |
| Auteur: |
Capitan-Vallvey, L. F. Valencia, M. C. Nicolas, E. Arana |
| Verschenen in: |
Food additives and contaminants. Pt. A, Chemistry, analysis, control, exposure & risk assessment |
| Paginering: | Jaargang 21 (2004) nr. 1 pagina's 32-41 |
| Jaar: |
2004-01 |
| Inhoud: |
A simple, rapid and inexpensive monoparameter flow-through sensor has been developed for the determination of saccharin in low calorie and dietary products. The method is based on the transient adsorption of the sweetener on Sephadex G-25 solid phase packed to a height of 20 mm in the flow cell. The optimal transient retention of the synthetic sweetener, in terms of sensitivity and sampling frequency, was obtained when pH 2.75 citric acid-sodium citrate buffer 5 × 10-3 M was used as a carrier at a flow-rate of 1.5 ml min-1. Saccharin was determined measuring its intrinsic absorbance at 217 nm at its residence time. Calibration graphs for peak height and peak area were linear over the range 5.0-200.0 μg ml-1, RSD 1.18%, and 1.0-200.0 μg ml-1, RSD 0.78%, respectively. Saccharin was determined in several food samples measuring height or area peak, obtaining recoveries ranging between 98-104 and 99-102% for height and area peak, respectively. The procedure was validated for use in the determination of saccharin in low calorie and dietary products giving reproducible and accurate results. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 8 gevonden artikelen
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