FIGURE 4 - uploaded by Saluma Samanman
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The calibration curve between the color intensity and the concentration of Sodium hydrosulfite 10 to 30 ppm. Inset the image of the corresponding PVA-DTNB color change with the sulfite addition.
Source publication
A sensor for determination of sodium hydrosulfite using a cryogel entrapped 5,5-dithiobis-2-nitrobenzoic acid (DTNB) was developed. This sensor is based on the chemical reaction between sodium hydrosulfite and DTNB reagent yielding a yellow product of 5-mercapto-2-nitrobenzoate which can be easily observed by naked-eyes and digital image analysis....
Context in source publication
Context 1
... appropriate conditions, the DTNB reagent concentration of 2.50 mg/L was chosen with a reaction time of 7 minutes. The linear range was obtained from 10 to 30 ppm with a coefficient of determination (R 2 ) of 0.9839 ( Figure 4) the linear regression equation was y = 2.5679x-14.364. For color visual observation of Sodium hydrosulfite, if was found that the color seen with the naked eye was yellow color related to the sodium hydrosulfite concentration. ...
