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Analysis of Carbohydrates and Anions

By analyzing carbohydrates and anions, such as oxalate, chloride, sulfite, sulfate, and thiosulfate ions, a deeper understanding of the chemical balance can be obtained. Process control within the cellulose industry is crucial for reducing operational issues and ensuring a smooth production process.

Carefully monitoring the levels of these substances contributes to optimizing the use of chemicals in the process. For example, knowledge of oxalate ions can help prevent the formation of lime deposits in equipment, which can lead to operational disruptions and production delays. Similarly, monitoring chloride, sulfite, sulfate, and thiosulfate ions is important to ensure correct chemical mixtures and to avoid unwanted reactions that may affect product quality or process efficiency.

Having a clear understanding of the chemical balance in the process enables the company to make well-informed decisions and take actions to optimize production and minimize downtime. This can lead to increased efficiency, reduced production costs, and improved product quality, thereby enhancing the company's competitiveness and profitability.

Examples of anions:

  • halides (chloride, iodide, bromide)
  • acid oxides (sulphate, carbonate, bicarbonate, phosphate)
  • organic acids (acetate)
  • sulphide
  • borate
  • chlorate
  • oxalate

We measure carbohydrate composition in pulp: arabinose, galactose, glucose, mannose and xylose.

Incrustations are serious problems, not least when the use of pulp increases the degree of closure. It is common to check the total content of oxalate and the proportion of free oxalate ions to get an idea of ​​the risk of encrustation. Examples of common analyzes are sulphite, sulphate and thiosulphate ions which are found in, among other things, cooking liquids. It is also common to analyze the content of chlorate in connection with environmental analyzes for bleachers.

Paper and pulp samples analyse, among other things, the total content of chlorine, the total content of sulfur, organic chlorine and washable chloride and sulphate. For these analyses, ion chromatography is used for the final determination of chloride and sulfate.

Christina Wedin

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Christina Wedin

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+46 10 722 32 47

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