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Study of naphthalene and phenanthrene by microemulsion room-temperature phosphorimetry

✍ Scribed by Wei-Jun Jin; Yan-Sheng Wei; Wen-Sheng Duan; Chang-Song Liu; Su-She Zhang

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
451 KB
Volume
287
Category
Article
ISSN
0003-2670

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✦ Synopsis

The effect of pH on the deoxygenation rate and phosphorescence intensity in microemulsion systems was studied. It was found that more intense room-temperature phosphorescence (RTP) can be obtained and the deoxygenation time can be decreased from more that 30 min to less than 100 s if the pH is maintained in the range 7-7.5. In addition, with increase in sodium sulphite concentration the deoxygenation rate increased. Other conditions such as the concentrations of sodium dodecyl sulphate and thallium(I) nitrate were investigated in detail. For the results, the microemulsion RTP of naphthalene and phenanthrene was improved. Limits of detection of 1.3 x 10e7 mol 1-i for naphthalene and 7.0 x lo-' mol 1-l for phenanthrene were achieved.

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