Internal Standards for Quantitative Analysis of Chemical Warfare Agents by the GC/MS Method: Nerve Agents

Table 2

Evaluation of the chromatographic peak area of tabun and heptan-1-ol at m/z 70 as a linear function of their concentration (critical values of the correlation coefficient R_CRIT 0.99 and QC coefficient QC_CRIT 5.00).

GC/MS compound	7890A/5975C		Intuvo 9000/5977B		EM 640
	Tabun	Heptanol	Tabun	Heptanol	Tabun	Heptanol
Retention time (min)	13.3	10.4	10.3	7.8	12.6	9.8
Linearity range (mg/L)	2.5–40	2.5–40	0.5–10	0.5–10	10–50	10–50
R	0.9988	0.9994	0.9999	0.9968	0.9999	0.9996
QC	3.28	2.56	0.86	4.13	0.21	1.49
Gradient (A × 10^−6 × L/mg)	0.71	1.4	0.13	0.25	0.015	0.032
Intercept (A × 10^−6)	0.065	−0.34	−0.0030	−0.0090	0.00012	−0.015
Response factor FR	0.49		0.52		0.48
Average value of FR	0.50