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. 2014 Nov;27(11):1615–1622. doi: 10.5713/ajas.2014.14305

Table 4.

Moisture concentrations (%) in DDGS1, and DDGS2 determined by various oven methods and the Karl Fischer (KF) method (Exp. 2)1

Ingredient Oven-drying method KF method3
Drying time (h) Drying temperature (°C)
1352 95 105 115 125
DDGS15,6 1 11.4±0.02 6.9±0.04 7.2±0.03 8.4±0.03 8.1±0.08 7.5±0.02
2 7.3±0.04 7.8±0.04 9.3±0.02 10.1±0.11
3 7.3±0.04 8.74±0.06 9.2±0.06 11.3±0.15
4 7.8±0.03 8.9±0.06 9.4±0.05 11.4±0.07
5 7.6*±0.02 9.3±0.07 10.7±0.06 11.7±0.23
6 8.0±0.03 9.4±0.04 10.8±0.07 12.1±0.06
9 8.8±0.11 10.1±0.19 10.9±0.21 13.0±0.15
15 9.0±0.06 11.2±0.13 12.9±0.11 13.3±0.12
24 10.2±0.13 11.7±0.01 13.1±0.17 15.5±0.1
DDGS25,6 1 13.1±0.13 7.2±0.04 7.6±0.08 8.7*±0.03 10.2±0.15 8.8±0.05
2 7.6±0.06 8.6±0.11 8.9±0.10 11.6±0.14
3 7.7±0.03 9.04±0.08 9.3±0.01 11.8±0.15
4 8.3±0.10 9.4±0.05 10.9±0.13 13.2±0.05
5 8.1±0.17 10.0±0.07 11.6±0.15 12.2±0.09
6 7.9±0.03 9.7±0.20 11.7±0.34 13.6±0.10
9 8.9±0.12 11.2±0.04 12.4±0.19 14.4±0.08
15 9.0±0.14 11.7±0.15 12.8±0.15 15.0±0.18
24 10.4±0.15 12.5±0.12 13.5±0.06 15.9±0.07

DDGS, distillers dried grains with solubles.

1

n = 2 for KF and n = 3 for all oven methods.

2

An oven method drying at 135°C for 2 h (AOAC, 2005; method 930.15).

3

The Karl Fischer method (AOAC, 2005; method 2001.12).

4

An oven method drying at 105°C for 3 h (Shreve et al., 2006; NFTA 2.2.2.5).

5

The weight loss-on-drying measured by an oven method drying at 135°C for 2 h (AOAC, 2005; method 930.15) differed from the moisture measured by the KF method (p<0.05).

6

The weight loss-on-drying measured by an oven method drying at 105°C for 3 h (Shreve et al., 2006; NFTA 2.2.2.5) differed from the moisture measured by the KF method (p<0.05).

*

This method had the least deviation (%) from the KF method.