Table 3. Change of TBA value of frying oil and sweet and sour pork with reusing times

Frytime/day	Frying oil				Frying food
	Soybean oil	Lard	Canola oil	Palm oil	Soybean oil	Lard	Canola oil	Palm oil
Unused oil 1)	0.077–0.283gABCD	0.085–0.333gABCD	0.078–0.263gABC	0.055–0.299fABCD
1 t/0 d	0.380±0.057gB	0.650±0.078fA	0.335±0.051fB	0.733±0.160eA	0.411±0.082cA	0.462±0.089dA	0.414±0.049eA	0.630±0.206cA
10 t/1 d	0.804±0.115fB	0.921±0.052fB	0.613±0.057fB	1.759±0.422deA	0.637±0.155cA	0.715±0.219dA	0.846±0.139deA	0.849±0.195bcA
20 t/2 d	1.116±0.154efAB	1.561±0.135eA	0.982±0.089dB	1.373±0.449deAB	0.900±0.095cB	0.801±0.131dB	1.147±0.147dA	0.750±0.142bcB
30 t/3 d	1.273±0.128deB	2.338±0.351dA	0.828±0.052deB	2.071±0.430dA	1.575±0.237bA	2.023±0.545cA	1.907±0.349cA	0.859±0.195bcB
40 t/4 d	1.551±0.151cdB	1.842±0.154eB	0.808±0.052deC	3.272±0.444cA	2.222±0.315abA	2.523±0.468cA	2.283±0.295bcA	1.106±0.243abcB
50 t/5 d	1.807±0.074bcC	2.882±0.310cB	1.698±0.319cC	3.909±0.709cA	2.030±0.395abB	2.663±0.308cA	2.321±0.358bcAB	0.640±0.146cC
60 t/6 d	1.640±0.409cBC	2.314±0.265dB	1.595±0.329cC	5.528±0.437bA	2.540±0.375aB	3.560±0.467bA	3.002±0.429aAB	1.068±0.353abcC
70 t/7 d	1.698±0.201cC	2.749±0.162cB	1.458±0.142cC	5.970±0.329bA	2.044±0.494abB	3.803±0.270bA	2.745±0.437abB	1.174±0.276abC
80 t/8 d	2.068±0.175bB	2.831±0.276cB	2.482±0.232aB	8.869±0.890aA	2.684±0.366aB	4.460±0.348aA	3.173±0.496aB	1.140±0.225abC
90 t/9 d	2.814±0.311aC	5.114±0.208aB	2.112±0.100bD	8.048±0.530aA	2.328±0.606aB	3.522±0.602bA	2.838±0.575abAB	1.085±0.291abcC
100 t/10 d	3.142±0.135aBC	3.454±0.315bB	2.187±0.084bC	7.924±1.064aA	2.461±0.670aB	3.351±0.226bA	2.738±0.268abAB	1.510±0.388aC

All values are mean SD of three replicates.
Storage period with unused oil during 10 the days.
Means within a column with different letters are significantly different (p<0.05).
Means within a row column with different letters are significantly different (p<0.05).