TABLE 19.

Laboratory instrumentation requirements for quantitative analysis of salt iodine content

Titration method

• Requires a balance accurate to at least 2, preferably 3, decimal points (0.001 g)

• Burette

• Hotplate and appropriate glassware

Analytical method

• Single and multiposition magnetic stirrers

• Bottle-top dispensers

• A self-zeroing burette

• An analog or digital bottle-top burette for rapid titration

• A fume hood for the preoxidation step

Potentiometric method

• Potentiometer instrument, including dedicated ion selective electrodes for iodine

Measurement

WYD iodine checker method

• Instrument procured from China; chemicals can be obtained locally