1. Methods to Analyze Iodine in Salt Moldova – April 2004 - Arnold Timmer UNICEF Regional Office

2. Methods Titration Rapid Test kit Iodine Checker Machine

3. Titration Quantitative Accurate and reliable Inexpensive Suitable for fixed labs and trained staff in salt companies, external quality control, nutrition/public health center

4. Rapid Test Kit Qualitative: yes or no Inexpensive Easy to perform by untrained staff Suitable for small salt producers, salt importers, children at school, household surveys Not good for quality assurance

5. Iodine Checker Machine

6. Iodine Checker Measuring iodine in salt quickly and precisely during it production and distribution can be difficult Titration methods accurate but are not easily applied in salt plants The Salt Research Institute of the China National Salt Industry Corporation developed the WYD Iodine Checker

7. Iodine Checker Machine Measurement range 10-80 mg/kg Method: –Fixed amount of iodized salt (1 g) is dissolved in distilled water, then H2SO4 (sulfuric acid) and KI (potassium iodide) are added. –iodine reacts with starch to produce a blue color Works on 220 V or batteries Cost 300 US$

8. CDC and Morton Salt Method Comparison

9. Independent testing: –Chemical Engineering, Univ. Toronto, Canada results agreed closely with titration acceptable accuracy, precision, and reproducibility –China National IDD Reference Laboratory assessed in 100 labs in salt plants precision slightly lower than that of titration batch variance coefficient  5% practical to use user-friendly