Extraction of Parquat from Blood by Clinoptilolite

Table 1

Recovery, limit of detection, limit of quantification, and within-laboratory error of paraquat extraction by Amberlite and clinoptilolite from different matrices.

Experiment; number	Experimental; group	% recovery; (mean ± sd)	LOD; (μg/mL)	LOQ; (μg/mL)	Repeatability; (%RSD)
1	Extraction of paraquat from blood by methanol		0.91	3.03	2.4
2	Extraction of paraquat from aqueous solution by Amberlite		0.34	1.13	3.5
3	Extraction of paraquat from aqueous solution by clinoptilolite		0.43	1.43	4.3
4	Extraction of paraquat from blood by Amberlite		0.49	1.63	6.3
5	Extraction of paraquat from blood by clinoptilolite		0.58	1.93	7.1

LOD: limit of detection; LOQ: limit of quantification; WRE: within-laboratory error; RSD: relative standard deviation. *Significantly ( value < 0.05) lower than maximum extraction recovery of 100.