摘要
FIA—1型铀自动分析仪由流动注射流路系统、微机系统、光度检测器和电子学电路组成。流路系统装有新设计的多功能注入阀,它能自动更换试样注入体积,具有多位路切换功能,可以方便地改变测定的范围项目,使仪器能进行多种方式的流动注射分析操作,具备了通用仪器的功能。流路系统中还配有对铀有特效富集能力的萃取色层柱,使仪器能适用各种复杂试样中痕量铀的测定。采用Br-PADAP作显色剂,加入阴离子表面活性剂十六烷基吡啶,在水相介质中测定铀。测定范围为0.02—500mg/L,相对标准偏差1％—2％,分析速度为30—90样品次/h。经实际应用考核,取得了满意的结果。
A new uranium automatic analyzer based on the flow injection analysis(FIA) principle has been developed. It consists of a multichannel peristaltic pump, an injection valve, a photomeric detector, a single-chip microprocessor system and electronic circuitry. The new designed multifunctional auto-injection valve can automatically change the injection volume of the sample and the channels so that the determination ranges and items can easily be changed. It also can make the instrument vary the FIA operation modes that it has functions of a universal instrument. A chromatographic column with extrac-tant-containing resin was installed in the manifold of the analyzer for the concentration and separation of trace uranium. The 2-(5-bromo-2-pyridylazo)-5-diethyl-aminophenol(Br-PADAP) was used as colour reagent. Uranium was determined in the aqueous solution by adding cetyl-pyridium bromide (CPB). The uranium in the solution in the range 0. 02-500 mg·L-1 can be directly determined without any pretreatment. A sample throughput rate of 30-90 h'1 and reproducibility of 1 - 2% were obtained. The analyzer has been satisfactorily applied to the laboratory and the plant.
出处
《铀矿冶》
CAS
1993年第1期38-45,50,共9页
Uranium Mining and Metallurgy
