Online NIR Analysis and Prediction Model for Synthesis Process of Ethyl 2-Chloropropionate

Table 1

The results of internal standard method.

Sample number	1	2	3	4	5	6	7
Molar ratio of ester and acid (/)	1.6658	0.4438	0.1177	0.0666	0.0362	3.4390	19.1854
Peak area ratio of ester and acid (/)	4.1061	1.1018	0.2755	0.1462	0.0792	8.9226	7.3567