Table 3
pH and titratable acidity in fresh and dried tomatoes on the top and bottom racks of solar dryers with and without concave concentrators.
Date Sample # Rack Tomatoes pH %Titratable acidity % of fresh pH % of fresh TA
26-Sep 1 Bottom Concentrator 4.23 0 42 101% 112%
2 Top Concentrator 4.33 0.37 104% 97%
3 Bottom Control 4.40 0.31 106% 82%
4 Top Control 4.32 0.37 104% 99%
5 – Fresh 4.17 0.38 100% 100%
28-Sep 6 Bottom Concentrator 4.37 0.30 104% 71%
7 Top Concentrator 4.46 0.28 106% 66%
8 Bottom Control 4.35 0.31 103% 72%
9 Top Control 4.42 0.29 105% 69%
10 – Fresh 4.21 0.42 100% 100%
24-Oct 11 Bottom Concentrator 4.31 0.29 101% 70%
12 Top Concentrator 4.49 0.27 105% 66%
13 Bottom Control 4.42 0.28 104% 69%
14 Top Control 4.44 0.31 104% 75%
15 – Fresh 4.27 0.41 100% 100%