茜素络合剂测水中氟 ,文献 [1]采用了混合显色剂的方式 ,比文献 [2 ]采用的分别加入各种试剂的方式更简捷 ,也减少了茜素络合剂加入量的误差 ,但事先配制茜素络合剂、缓冲液、硝酸镧三种试剂都需调节ｐＨ分别为 5 .0 ,4 .1及 4 .1,且所配混合显色剂不甚稳定 ,必须临用配制 ,造 Alizarin complexing agent to measure the water fluoride, literature [1] using a mixed reagent approach, than the literature [2], respectively, by adding a variety of reagents more simple way, but also reduces the amount of alizarin complexing agent Error, but the preparation of alizarin complexing agent, buffer, lanthanum nitrate three reagents are required to adjust the pH were 5.0, 4.1 and 4.1, and the mixed color reagent is not stable, you must With the preparation, made