Table 6. Linearity Results for Each Impurities and Carglumic Acid for Relative Response Factor Calculation, Graphs of Each Impurity Was Given in Figures S1–S5 and Tables S2–S6.

Name	R2	Slope	Relative Response Factor (RRF)
Carglumic acid	0.9999	0.4429	1.0
Pyroglutamic acid	0.9999	1.2426	2.8
Related compound A	1.0000	1.5426	3.5
Pyrocarglumic acid	0.9999	4.6072	10.4
Dicarbamoyll-glutamic acid	0.9999	8.744	19.7