FORMALDEHYDE IN WHITE SUGAR: DETECTION AND CONTENT
DOI:
https://doi.org/10.31857/2500-2082/2022/6/73-77Keywords:
formaldehyde, beet white sugar, residual content, photometric method, calibration curve, optical density, turbidityAbstract
The article presents the results of verification, updating and practical application of the method for the photometric determination of formaldehyde in white sugar ICUMSA GS2-36, establishing the influence on the result of determining the turbidity of sugar solutions. The studies were carried out with calibration solutions of different concentrations and a modified measurement procedure. It was found that the calibration curve of formaldehyde in white sugar in the range of 0.001 to 0.1 mg/kg is characterized by linearity, a cuvette with an absorbing layer thickness of 10 cm should be used to measure light absorption. The applied stability of the light absorption values of the reagents allows the use of their values, determined once daily (the turbidity of sugar solutions does not affect the result). Based on the results of testing samples of white sugar, its safety was confirmed: 75% not contain formaldehyde, 25% contain in the range of 0.01 to 0.05 mg/kg. The specified technique in an updated version can be recommended for practical application.
