本文研究了新显色剂间溴偶氮羧与钡显色反应的最佳条件.在2,2’-联吡啶存在下,pH2.0混酸-NaOH介质中,Ba(Ⅱ)与显色剂迅速反应,形成稳定的1:2络合物.λ_(max)=710nm,ε_(710)=1.5×10~5L·mol~(-1)·cm~(-1),0～15μBa/25ml符合比尔定律,为已报导钡最灵敏的显色反应之一. In this paper, the optimum conditions for the chromogenic reaction of bromocarboxylazide with barium were studied. In the presence of 2,2’-bipyridine, The reaction rapidly formed to form a stable 1: 2 complex, λ max = 710 nm, ε 710 = 1.5 × 10 -5 L · mol -1 cm -1, 0-15 μBa / 25 ml Beer’s law is consistent with one of the most sensitive chromogenic reactions that have been reported for barium.