Determination of Curdlan Oligosaccharides with High-Performance Anion Exchange Chromatography with Pulsed Amperometric Detection

Table 4

Determination of method precision under repeatability (intraday) and intermediate precision (interday) conditions given as RSD (%) of peak area and retention time.

Analyte	Repeatability (n = 7)						Intermediate precision (n = 9)
	Peak area			Retention time			Peak area			Retention time
	C1	C2	C3	C1	C2	C3	C1	C2	C3	C1	C2	C3
D-glucose	3.83	4.01	3.38	0.08	0.05	0.06	4.84	4.85	3.85	0.68	0.42	0.58
(COS)2	3.89	3.22	1.77	0.33	0.30	0.23	3.09	4.32	2.98	0.99	0.85	1.04
(COS)3	3.05	2.35	1.52	0.23	0.19	0.28	4.16	3.85	2.87	1.08	0.94	0.98
(COS)4	2.69	3.27	1.64	0.21	0.13	0.19	2.51	3.96	3.02	1.12	0.84	0.45
(COS)5	3.71	3.65	2.42	0.24	0.12	0.33	4.04	4.02	2.98	1.28	0.65	0.66
(COS)6	2.82	3.37	2.41	0.29	0.31	0.36	3.69	4.13	5.11	1.02	1.14	0.75

RSD: relative standard deviation. C1 (mg/L): 1.7; C2 (mg/L): 3.3; C3 (mg/L): 6.7.