Rapid determination of the content of carboxymethyl cellulose sodium in aqueous solution by a color indicator-assisted spectroscopy
This paper reports on a color indicator-assisted spectrophotometric method for the determination of carboxymethyl cellulose sodium (CMC-Na) content in aqueous solution. Methyl blue (MB) was used as the color indicator and its absorbance at 597 nm can be instantly attenuated when the CMC-Na was intro...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Elsevier
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/1f71a08e27c4440397de75e909dd2015 |
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| Sumario: | This paper reports on a color indicator-assisted spectrophotometric method for the determination of carboxymethyl cellulose sodium (CMC-Na) content in aqueous solution. Methyl blue (MB) was used as the color indicator and its absorbance at 597 nm can be instantly attenuated when the CMC-Na was introduced. The results showed that there was a linear relationship (R2 = 0.999) between the inverse of MB absorbance at 597 nm and the content of CMC-Na; The present method has a very good measurement precision (relative standard deviation < 1.15%) and accuracy (relative error < 4.37%, when compared with the results measured using the oven-dry method). The present method is very simple and rapid, and it is suitable for use in the mill operation, aiming at a timely process control. |
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