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Table 2 Iodine levels in salt samples treated differently during iodation processes

From: Improved salt iodation methods for small-scale salt producers in low-resource settings in Tanzania

Condition of salt treatment Salt heap code no. Iodine content in salt (ppm)
   Top layer in bags Middle layer in bags Bottom layer in bags Estimated total iodine
   n Median (range) n Median (range) n Median (range) n Median (range)
Unsupervised iodation without altering KIO3 concentration (<100 g) or equipment 1 5 19.0 (18.0 – 25.4) 5 10.6 (6.3 – 11.6) 5 8.5 (4.2 – 15.9) 15 11.6 (4.2 – 25.4)
  2 5 45.5 (2.1 – 60.3) 5 5.3 (4.2 – 6.3) 5 2.1 (1.1 – 5.3) 15 5.3 (1.1 – 60.3)
  3 5 97.3 (14.8 – 110) 5 10.6 (8.5 – 14.8) 5 5.3 (4.2 – 18.0) 15 12.7 (4.2 – 110.0)
  Total 15 25.4 (2.1 – 110.0) 15 8.5 (4.2 – 14.8) 15 5.3 (1.1 – 18.0) 45 10.6 (1.1 – 110.0)
Unsupervised iodation using improved method and 204 g KIO3 8 5 55.0 (43.4 – 61.4) 5 55.0 (41.3 – 65.6) 5 58.2 (32.4 – 63.5) 15 56.1 (32.8 – 65.6)
  9 5 54.0 (50.8 – 74.1) 5 63.5 (59.2 – 71.9) 5 63.5 (59.2 – 83.6) 15 63.5 (50.8 – 83.6)
  10 5 61.5 (56.0 – 71.6) 5 58.2 (49.2 – 68.9) 5 65.4 (59.2 – 72.4) 15 61.5 (49.2 – 72.3)
  Total 15 59.2 (43.4 – 74.1) 15 60.3 (41.3 – 71.9) 15 60.3 (32.8 – 50.8) 45 59.9 (32.8 – 83.6)
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