PROBLEM TO BE SOLVED: To provide a syringe that measures a plurality of fluids precisely for sampling and injects them to the outside simultaneously, a microsyringe, and an injection method to an analyzer.SOLUTION: A syringe 1 includes: a barrel 2 a plunger 4 that slides to sample a fluid and injects it to the outside and a needle 3 leading to the outside. The barrel 2 includes a main flow passage 11 for receiving the fluid and a reserving passage 12. Between the needle 3 and the barrel 2, a needle communication passage 22 for connecting the needle 3 with the main flow passage 11, a reserving communication passage 23 for connecting the main flow passage 11 with the reserving passage 12, and a valve 20 for allowing the main flow passage 11 to communicate with the needle communication passage 22 or the reserving communication passage 23.COPYRIGHT: (C)2013,JPO&INPIT【課題】複数の流体を正確に計量しながら採取し、複数の流体を一度に外部へ注入する注射器、マイクロシリンジ、及び分析装置への注入方法を提供する。【解決手段】バレル2と、摺動して流体を採取し、及び外部へ注入するプランジャ4と、外部とを連通するニードル3とを備える注射器1において、バレル2に、流体を取り込む主流路11と貯留路12とを備えると共に、ニードル3とバレル2との間に、ニードル3と主流路11とを連通するニードル用連通路22と、主流路11と貯留路12とを連通する貯留用連通路23と、主流路11の連通先を、ニードル用連通路22、又は、貯留用連通路23に切り換えるバルブ20を備える。【選択図】図1
