Division 6.1.7 After boiling has continued for 120 seconds (by the stop-watch) start adding standard dextrose solution to the boiling flask (5.1) from the burette (6.1.2) in 0·5 ml increments until the colour of the methylene blue is discharged (see notes 2 and 3).
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Note the total volume of standard dextrose solution added up to and including the penultimate 0·5 ml increment (X ml).