WYD Iodine Checker

General Description:
Single wave-length photometer with the function of LCD readout, zero auto calibration and concentration readout.

Technical Specifications:
Stability: Drift less than 0.3 mg/kg in 10 minutes.
Measurement range: From 10 to 80 mg/kg
Readout: 0.1 mg/kg
Accuracy: analytical error is less than 2 mg/kg
Precision: Fluctuation is less than 2% (at the concentration of 50 mg/kg).
Bulk: 175×135×60 mm
Weight: 500g
Power requirement: AC 220V or DC 9V

Chemical reagents:
The following chemical reagents are needed for testing iodized salt, using WYD checker:

KIO3 >=99.8%
NaCl >=99.5%
Na2CO3 >=99.0%
KI >=98.5%
K2HPO4.3H2O >=99.0%
Na2B4O7.10H2O >=98.5%
H2SO4 (10%)
Soluble starch

The above listed reagents need to be ordered separately

Instrument:
WYD iodine checker
Balance (0.01g)
50ml tubes,
5ml and 10ml pipette

Weight/Volume/Dimensions:
Estimated weight: 1.94 kg
Estimated volume: 7 cdm

Instruction for use:
Weight 1 gram of iodized salt in 50 ml tube, add 10 ml of distilled water, 2 ml A solution (H2SO4 , Vitriol), 2 ml B solution (KI-starch, Potassium Iodide-starch), then add water to make 50 ml solution. Shake the tube until the salt is dissolved thoroughly. Insert the cell that contains this solution into the cell holder of WYD, the concentration is directly read on LCD.