Simultaneous Determination of Parathion, Malathion, Diazinon, and Pirimiphos Methyl in Dried Medicinal Plants Using Solid-Phase Microextraction Fibre Coated with Single-Walled Carbon Nanotubes

Table 4

Levels of malathion, diazinon, parathion, and pirimiphos methyl in studied medicinal plant samples (ng g⁻¹).

Groups	No.	Diazinon	Malathion	Parathion	Pirimiphos methyl
Borage	1	7.44	n.d	n.d.	n.d.
	2	n.d	3.35	n.d.	n.d.
	3	5.64	n.d	n.d.	n.d.
Zataria	1	98.55	20.43	n.d.	n.d.
	2	64.54	25.15	n.d.	n.d.
	3	130.25	14.34	n.d.	n.d.
Chamomile	1	53.15	22.93	n.d.	n.d.
	2	43.24	15.15	n.d.	n.d.
	3	49.65	10.54	n.d.	n.d.
Spearmint	1	12.54	6.53	n.d.	n.d.
	2	10.15	2.74	n.d.	n.d.
	3	4.25	4.83	n.d.	n.d.

Note: n.d.: not detected.