Simultaneous Determination of Benzene and Toluene in Pesticide Emulsifiable Concentrate by Headspace GC-MS

Table 1

The results of accuracy and precision (RSD%) studies for different matrices spiked with accurate benzene and toluene.

Analyte	Matrix	Spiking level (g/L)	Recovery range (%)	Recovery mean (%)	RSD%^a
Benzene	Xylene	10.9	99.5–103.9	102.5	1.9
	Stock solution A	9.9	101.3–104.1	102.6	1.0
	Stock solution B	10.1	100.6–103.0	101.8	1.1
	Stock solution C	10.7	102.0–103.1	102.7	0.4
	Stock solution D	10.7	102.0–102.7	102.3	0.3
Toluene	Xylene	10.2	93.6–109.2	100.1	8.1
	Stock solution A	10.5	101.2–118.4	108.7	6.7
	Stock solution B	10.3	99.1–117.1	109.5	6.7
	Stock solution C	10.6	95.0–108.0	100.2	4.9
	Stock solution D	10.3	96.8–111.2	102.7	5.5

^a𝑛=5.