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Quality control charts for storage of pears

Modified Shewart quality control charts were constructed for the storage of pears coated with different concentrations of sucrose polyesters. Weight loss, respiration rate, acidity, soluble solids, ascorbic acid and colour (Hunter a and b values) are the quality factors used for the construction of quality control charts. These charts will be helpful in maintaining the inevitable quality loss to within acceptable limits and in readjusting the storage conditions if the acceptable limits are exceeded.