Spectrofluorimetric flow injection determination of trace amounts of periodate

A sensitive, rapid and selective procedure is proposed for the flow injecti on determinations of periodate by spectrofluorometric detection. The method is based on the reaction of periodate with Alizarin Navy Blue in basic sol ution. The reagents and manifold variables influence on the sensitivity hav e been investigated and the optimum conditions are established. Periodate c an be determined for the range of 0.250-5.00 mug ml(-1) with a limit of det ection of 0.08 mug ml(-1), and with a sample rate of 15 +/- 2 samples h(-1) . The relative standard deviations for eight replicate determination of 0.5 00 and 5.00 mug ml(-1) was 1.3 and 1.1%, respectively. Periodate can be det ermined in the presence of iodate and bromate. The proposed method was used to determination of periodate in water samples. (C) 2001 Elsevier Science B.V. All rights reserved.