The
autoinjector was customized with an air/prepuncturing needle in titan,
a vial sensor strip in PEEK, and a plastic washing chamber. Guard
column CS5G and analytical column CS5A were from Dionex Corp.
(Sunnyvale, CA). The postcolumn system consisted of a reaction-mixing
tee in Teflon (Jour Research, Onsala, Sweden) and a self-made reaction
coil consisting of a Teflon tube (i.d. ) 0.2 mm) coiled to optimize