Table 2. Technical Variation among Subsets of Nes⁺ Controls at Selected SPs^a.

	Coefficient of variation for responses at SP
Type of Variation	d_71.1	d_107.1	d_111.6	d_125.1	d_156.6	d_161.1
Among-batch	0.45 (0.45)	0.49 (0.64)	0.83 (1.10)	0.18 (0.18)	0.53 (0.53)	0.48 (0.48)
Within-batch (A)	0.68 (0.68)	0.94 (1.21)	0.48 (0.48)	0.38 (0.38)	0.38 (0.38)	0.54 (0.54)
Within-batch (B)	0.95 (0.95)	0.34 (1.23)	0.26 (0.26)	0.28 (0.28)	0.23 (0.23)	0.61 (0.61)
TQ-MS only	0.71 (0.71)	0.34 (0.59)	0.31 (0.61)	0.20 (0.20)	0.34 (0.34)	0.61 (0.71)

^aEach value is a coefficient of variation, calculated with exclusion of false negatives (no parentheses), or from all relevant responses (in parentheses). The estimates of within-batch variation (A and B) come from different batches. The values for d_125.1 relate to the data in Figure 6.