Injections from sub-μL sample volumes in commercial capillary electrophoresis.

•Simple set-up for injections from sub-μL samples in Agilent 7100 CE is presented.•Disposable inserts are accommodated in spring-loaded vials in the CE autosampler.•Replicate injections are carried out from sample volumes as little as 250nL.•Compatibility with various injection/detection modes, separation capillaries and BGEs is achieved.•The proposed set-up is used for analyses of sub-μL acceptor/donor solutions from μ-EMEs.