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Paragraph 5 APPARATUS

Original text. Later amendments are not shown.

5.1

Electric hotplate with variable temperature control.

5.2

pH meter

Note:

Where the boron content of an extract is to be determined, do not use borosilicate glassware. As the method involves boiling, teflon or silica is preferable. Rinse the glassware thoroughly if it has been washed in detergents containing borates.