Discussion on analytical methods for certain substances in soda ash products
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Are there any calcium, magnesium ions, and sulfate ions in soda ash products? What methods can be used to detect these substances, and which method yields relatively accurate results? Dear fellow seafarers, please share your valuable opinions!
The determination of sulfate is mainly carried out using the barium sulfate gravimetric method; the reagents used are barium chloride solution, hydrochloric acid solution, and silver nitrate solution. Calcium and magnesium ions are mainly filtered, washed, dried, and weighed (since they primarily exist in the form of water-insoluble substances such as calcium carbonate and magnesium carbonate)
““Calcium and magnesium ions are primarily removed through filtration, washing, drying, and weighing; this is because calcium and magnesium ions mainly exist in the form of water-insoluble substances such as calcium carbonate and magnesium carbonate.” Does this mean that all water-insoluble substances in soda ash products can be considered as calcium and magnesium ions?
For trace amounts of sulfate in sodium carbonate, ion chromatography is the preferred method for detection. Calcium and magnesium impurities in sodium carbonate can be determined by atomic spectroscopy or ion chromatography.