摘要:

Room temperature phosphorescence (RTP) signals on filter paper depend on experimental conditions including type of filter paper, drying and cooling times of the paper after spotting the sample, and type and concentration of heavy-atom present. RTP of biphenyl, as a model compound, on six filter papers using eleven different heavy-atoms is examined. The highest RTP signal is observed when S&S 903 filter paper is used and dried in an oven at 110°C for 10 min and cooled in a nitrogen gas stream for 10 min. RTP characteristics of several polychlorinated congeners and mixtures are presented without and with the presence of different heavy-atoms; RTP intensities increase and the limits of detection decrease. Lifetimes of all compounds exhibiting RTP are measured. An RTP comparison study of several PCBs on two different types of filter papers is also reported.

ISSN:0003-2719    

DOI:10.1080/00032718808082029

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Periodate oxidizes 2-HBGH to a red colored compound in ammonia medium. The reagent is not oxidized by H2O2, IO3−, BrO3−, S2O8=, S2O5=, ClO4−, ClO3−under these conditions. Based on the above properties a method is described for the spectrophotometric determination of periodate.

ISSN:0003-2719    

DOI:10.1080/00032718808082030

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Citrazinic acid was tested with 34 cations in slightly acidic medium but U(VI) and Fe(III) only gave colored reactions. Fe(III) is masked with ascorbic acid thus the reagent can be used for the simultaneous spectrophotometric determination of U(VI) and Fe(III) in presence of the remaining tested cations.

ISSN:0003-2719    

DOI:10.1080/00032718808082031

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0003-2719    

DOI:10.1080/00032718808082018

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor