Ikephu yevial enentambo ingaba nendawo yokuvula ukusetshenziswa kwe-autosampler kanye nokwengezwa okujwayelekile, noma ikepisi ye-polypropylene kanye nolwelwesi kunganikezwa. Lawa ma-screw caps ahlabayo aklanyelwe ukusetshenziswa ngesikhathi esisodwa, futhi ngenxa yokuthi awekho amakepisi nama-seal azohlanganiswa, isikhathi sokulungiselela isampula siyancishiswa.