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. 2010 Nov 5;48(2):197–203. doi: 10.1007/s13197-010-0154-6

Table 2.

Effect of juice extraction methods and processing temperature-time on ascorbic acid and non-enzymatic browning of juice during storage

Ascorbic acid, mg/100 ml Non-enzymatic browning, O.D. at 440 nm
Storage period, months Storage period, months
1 2 3 4 5 6 1 2 3 4 5 6
Extraction method
 J1- Screw type 31.6 29.9 27.7 26.0 24.0 22.3 0.13 0.16 0.18 0.21 0.24 0.30
 J2- Power operated 31.0 29.3 27.1 25.4 23.7 21.5 0.13 0.16 0.18 0.21 0.24 0.31
 SEm± 0.142 0.158 0.138 0.134 0.069 0.135 0.001 0.001 0.001 0.002 0.002 0.002
 CD (p = 0.05) (n = 3) 0.406 0.453 0.424 0.382 0.198 0.385 NS NS NS NS NS NS
Treatments
 P1 t15 34.1 32.4 30.1 28.5 26.7 23.8 0.11 0.13 0.16 0.19 0.22 0.28
 P1 t25 33.0 31.3 29.2 27.3 25.6 23.6 0.12 0.14 0.16 0.19 0.23 0.29
 P1 t35 31.8 30.1 27.9 26.2 24.5 22.5 0.13 0.15 0.17 0.20 0.23 0.29
 P2 t10 32.6 30.8 28.6 27.0 23.7 22.3 0.13 0.15 0.18 0.20 0.24 0.29
 P2 t20 30.9 29.2 27.0 25.3 23.5 21.6 0.13 0.15 0.18 0.21 0.24 0.30
 P2 t30 29.8 28.1 25.8 24.2 22.4 20.5 0.14 0.16 0.19 0.21 0.25 0.31
 P3 t5 31.2 29.5 27.3 25.6 23.9 21.9 0.15 0.17 0.19 0.22 0.25 0.32
 P3 t10 30.0 28.2 26.0 24.3 22.6 20.7 0.15 0.17 0.19 0.22 0.26 0.32
 P3 t15 28.6 26.8 24.6 23.0 21.3 19.4 0.16 0.18 0.20 0.23 0.27 0.33
 SEm± 0.301 0.335 0.314 0.283 0.147 0.286 0.002 0.002 0.003 0.003 0.004 0.005
 CD (p = 0.05) (n = 3) 0.863 0.963 0.902 0.810 0.421 0.818 0.006 0.007 0.008 0.009 0.011 0.014

p1t15 – p3t15: As in Table 1