Table 1.

Comparison of skin emission sampling methods.

Classification	Sampling Method	2-Nonenal Content (ng) Mean ± SD (n = 3)
A	Glass cup sampling	0.47 ± 0.51
B	Direct SPME sampling	N.D. 1
C	Wiping method	0.90 ± 0.13
D	Pasting method	0.18 ± 0.23

¹ N.D.: not detectable.