Quantitative Analysis of Volatile Impurities in Diallyldimethylammonium Chloride Monomer Solution by Gas Chromatography Coupled with Liquid-Liquid Extraction

Table 1

Comparison of external and internal standard methods.

Methods	Conc. (mg L^−1)	Found	RSD (%)
External standard method (peak area, )	10	938 854 1305 1042 1202	17.35
	30	2741 2983 3364 3687 3051	11.58
	50	3801 6132 5349 5895 5859	17.42
Internal standard method (peak area ratio, )	10	0.419 0.413 0.412 0.427 0.420	1.45
	30	1.25 1.24 1.30 1.29 1.24	2.27
	50	2.21 2.14 2.15 2.19 2.16	1.41