Validation of an LC-MS/MS Method for Urinary Lactulose and Mannitol Quantification: Results in Patients with Irritable Bowel Syndrome

Table 2

Between-run and within-run accuracy and precision.

Analyte	Nominal concentration (mg/L)	Imprecision		Accuracy
		Intra-assay CV (%)	Interassay CV (%)	Intra-assay (%)	Interassay (%)
Mannitol	100	5.1	12.1	96.4	95.9
	400	4.9	11.5	93.2	94.7
	600	3.8	12.4	96.8	96.7
Lactulose	50	2.9	5.1	85.6	85.8
	100	4.5	5.6	91.3	90.9
	200	4.2	6.3	94.3	94.3