Simultaneous Determination of Ternary Mixture of Carboxin, Chlorpyrifos, and Tebuconazole Residues in Cabbage Samples Using Three Spectrophotometric Methods

Table 3

Percentage mean recovery of carboxin, chlorpyrifos, and tebuconazole in real cabbage samples by the proposed methods.

(a)

Carboxin fortification level (μg/mL)	DDRSD		SDRS				MCRS
	242 nm		256 nm		258 nm		306 nm
	%R	%RSD	%R	%RSD	%R	%RSD	%R	%RSD
1.0	90.70	5.28	87.02	5.90	87.22	5.01	88.76	5.91
15.0	90.95	2.47	90.98	5.34	89.79	3.33	91.78	2.18
30.0	94.53	4.01	88.41	4.68	88.42	4.61	92.45	2.66

(b)

Chlorpyrifos fortification level (μg/mL)	DDRSD						SDRS				MCRS
	236 nm		276 nm		300 nm		290 nm		292 nm		280 nm
	%R	%RSD	%R	%RSD	%R	%RSD	%R	%RSD	%R	%RSD	%R	%RSD
1.0	99.9	5.99	96.89	4.77	103.89	5.54	108.53	4.52	107.36	5.98	103.82	3.14
30.0	98.19	4.45	95.35	3.78	96.95	3.34	96.29	2.29	96.19	4.94	97.26	2.67
50.0	93.99	2.20	95.42	2.57	97.02	2.03	92.48	1.44	92.32	2.11	95.07	3.05

(c)

Tebuconazole fortification level (μg/mL)	DDRSD		SDRS				MCRS
	226 nm		226 nm		228 nm		240 nm
	%R	%RSD	%R	%RSD	%R	%RSD	%R	%RSD
1.0	88.95	5.53	87.19	4.11	87.79	4.93	91.10	2.36
20.0	93.59	3.32	93.74	4.03	93.79	2.67	95.46	2.15
45.0	92.22	3.46	98.00	4.50	96.33	4.84	96.95	1.57