Orthogonal Design Study on Factors Affecting the Determination of Common Odors in Water Samples by Headspace Solid-Phase Microextraction Coupled to GC/MS

Table 8

The relative standard deviations (RSDs)^a for 2-MIB and GSM.

Exp. no.^b	2-MIB		GSM
	20 ng L^−1	100 ng L^−1	20 ng L^−1	100 ng L^−1
1	24.2	93.8	19.3	102.1
2	24.3	90.1	20.5	100.7
3	23.2	102.0	20.6	102.1
4	22.6	95.1	21.9	100.6
5	22.1	94.0	20.6	106.7
6	20.2	91.0	20.4	105.7
7	20.2	91.2	19.8	107.2
RSD (%)^a	7.6	4.35	3.8	2.75

aUsing IBMP as the internal standard. Compound concentration: 10 ng L⁻¹. ^bSpiked de-ionized water sample.