Paclobutrazol Residue Determination in Potato and Soil Using Low Temperature Partition Extraction and Ultrahigh Performance Liquid Chromatography Tandem Mass Spectrometry

Table 2

Final residues of paclobutrazol in potato and soil.

Sample	Treatment	Dosage g (available ingredient)/ha	Residues (mg/kg ± SD, ), day after spraying
			22 d	32 d	40 d
Potato	Foliar spray without cover	40	ND	ND	ND
		60	0.041 ± 0.012	0.022 ± 0.008	0.017 ± 0.006
		100	0.732 ± 0.028	0.521 ± 0.022	0.481 ± 0.017
	Foliar spray with cover	40	ND	ND	ND
		60	ND	ND	ND
		100	ND	ND	ND
Soil	Foliar spray without cover	40	0.081 ± 0.019	0.032 ± 0.013	0.021 ± 0.006
		60	0.517 ± 0.027	0.258 ± 0.021	0.224 ± 0.017
		100	2.71 ± 0.23	1.42 ± 0.17	1.08 ± 0.12
	Foliar spray with cover	40	ND	ND	ND
		60	ND	ND	ND
		100	ND	ND	ND

ND: not detected.