4.3.1.1 Types of Sample Injection

There are several methods for introducing samples into CE systems. It is important to note that some sample is always injected when inserting a capillary into the sample reservoir, due to capillary action. This volume is called the Zero-Injection, and the effect of this initial injection on sample migration and analysis is called the Zero-Injection Effect. In most cases, this phenomenon is insignificant, but it can be important in systems being employed for quantitative analysis.