Table 2.

Accuracy (% recovery), intra-day precision (RSD_r, n = 5) and inter-day precision (RSD_R, n = 9) for dithiocarbamates (as CS₂) in cardamom and black pepper (whole and crushed/ground forms)

Fortification level (mg/kg)	Mean recovery (% ± SD)	RSDr (%)	Predicated RSDr (%)a	HorRatrb	RSDR (%)
Cardamom
0.1	78 (± 5)	6.7	22.4	0.30	14.8
0.5	82 (± 6)	6.7	17.6	0.38	13.2
1.0	90 (± 8)	7.8	15.9	0.49	12.5
Cardamom crushed
0.1	73 (± 6)	7.4	22.4	0.33	10.8
0.5	85 (± 10)	11.8	17.6	0.67	12.1
1.0	93 (± 6)	6.8	15.9	0.43	9.2
Black pepper
0.1	81 (± 6)	7.2	22.4	0.32	13.1
0.5	91 (± 5)	5.3	17.6	0.30	14.2
1.0	97 (± 8)	8.1	15.9	0.51	12.9
Black pepper ground
0.1	78 (± 5)	7.1	22.4	0.31	11.6
0.5	76 (± 7)	8.2	17.6	0.47	9.8
1.0	81 (± 9)	10.6	15.9	0.67	12.1

RSDr repeatability relative standard deviation, RSD_R Reproducibility relative standard deviation

^aPredicted RSD is calculated as${\mathit{PRSD}}_r={2C}^{-0.15}$

^bHorRat_r is calculated as RSD_r / PRSD