. 2013 Mar;18(1):50–59. doi: 10.3746/pnf.2013.18.1.050

Table 4.

Change in nonvolatile organic acid contents of black jujube extract according to aging times

Organic acid contents (mg/100 g)	Aging time (hr)

	0	24	48	72
Oxalic acid	436.08±10.50^a	697.97±8.01^b	720.49±5.58^b	755.67±12.93^c
Pyruvic acid	22.03±3.36^a	44.60±2.90^b	82.34±3.80^c	45.44±1.58^b
Lactic acid	40.27±2.91^a	45.56±5.83^a	41.92±10.40^a	42.89±3.92^a
Acetic acid	5.24±1.95^a	8.79±1.56^ab	8.55±0.97^ab	12.96±2.39^b
Malic acid	1.25±0.78^a	3.86±0.91^b	5.47±0.83^b	5.86±1.05^b
Citric acid	198.92±13.11^a	384.52±8.29^b	426.23±13.63^c	498.54±17.13^d

Data are expressed as mean±standard error values (n=3). Mean with different letters in each row are significantly different (p<0.05) by Duncan’s multiple range test.