Selective heavy-atom perturbation for analysis of complex mixtures by room-temperature phosphorimetry

Vo‐Dinh, Tuan; Hooyman, J. R.

doi:10.1021/ac50048a006

Cited by 110 publications

(44 citation statements)

References 26 publications

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“…The use of the selective phosphorescence enhancement and differences in the spectral characteristics between analyte and concomitant substances in complex samples may allow selective determination without the need for previous separation procedures. 14 Under these optimized instrumental and experimental conditions, the RTP method presented figures of merit appropriate for trace-level determination of BNT. Recoveries close to 100% were achieved using the analytical curve procedure.…”

Section: Discussionmentioning

confidence: 98%

Determination of benzo[b]naphtho[2,3-d]thiophene (BNT) in sediments using selective heavy atom induced room-temperature phosphorimetry

Cardoso

Aucélio

2006

J. Braz. Chem. Soc.

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As características fosforescentes do benzo [b]nafto [2,3-d]tiofeno (BNT) foram estudadas sob diferentes condições experimentais. Melhores resultados foram obtidos utilizando-se Tl(I) e Pb(II) como indutores de fosforescência, em ambos os casos usando dodecilsulfato de sódio (SDS) como modificador de superfície. Nestas duas condições, curvas analíticas de 3 ordens de magnitude forneceram limites de detecção e quantificação de respectivamente 0,6 e 2,0 ng na presença de Tl(I) e 3,2 e 10,7 ng na presença de Pb(II). A potencialidade da metodologia desenvolvida para determinação de BNT em nível de traços foi testada usando amostras de sedimento enriquecidas com o analito de interesse e Pb(II) como átomo pesado seletivo para indução de fosforescência. A recuperação de BNT foi bastante satisfatória (101,5±7,4%, n=6) indicando que o método pode ser aplicado para a análise de amostras complexas. A interferência de outros hidrocarbonetos policíclicos aromáticos (pireno, criseno, carbazol, 7,9-dimetilbenzo[c]acridina e dibenzotiofeno) foi avaliada e o método foi considerado seletivo na presença destas substâncias. Room-temperature phosphorescence characteristics of benzo[b]naphtho[2,3-d]thiophene(BNT) were studied under several experimental conditions. Best phosphorescence was obtained using Tl(I) and Pb(II) as heavy atom enhancers, both in the presence of SDS as surface modifier. Under these two conditions of maximum phosphorescence, working curves with three orders of magnitude were achieved and absolute limits of detection and quantification of respectively 0.6 and 2.0 ng in the presence of Tl(I) and 3.2 and 10.7 ng in the presence of Pb(II). The RTP potential for selective trace-level determination was tested using a sediment sample spiked with BNT and using Pb(II) as the selective heavy atom enhancer. The recovery of BNT was very satisfactory (101.5 ± 7.4%, n = 6) indicating that the method can be properly applied for the analysis of complex samples. The interference potential from other polycyclic aromatic hidrocarbons (pyrene, chrysene, carbazole, 7,9-dimethylbenz[c]acridine and dibenzothiophene) was evaluated and the method was considered selective in the presence of these substances.

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Section: Discussionmentioning

confidence: 98%

Determination of benzo[b]naphtho[2,3-d]thiophene (BNT) in sediments using selective heavy atom induced room-temperature phosphorimetry

Cardoso

Aucélio

2006

J. Braz. Chem. Soc.

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“…An important feature of the room-temperature phosphorimetry technique is the possibility of using external heavy atom perturbers to enhance the phosphorescence emission of individual compounds (7,(16)(17)(18).…”

Section: Heavy Atom Effectmentioning

confidence: 99%

Room-Temperature Phosphorimetry of Salicylic Acid in Pharmaceutical Powders

Bruzzone

1998

Microchemical Journal

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“…Such effect is very dependent on the analyte/phophorescence inducer pair and therefore, the correct choice of phosphorescence inducer (inorganic salts of high atomic weight elements) may grant selective phosphorescence observation of a specific PAC in the presence of several other ones. 8,9 Selectivity in SSRTP is enhanced by the use of synchronous luminescence scanning which minimize the phosphorescence signal from concomitant species that present values of Dl (difference between the maximum wavelengths of excitation and emission) different from the analyte of interest. 10 Metrology is a science of measurements including the ones carried out in analytical chemistry.…”

Section: Introductionmentioning

confidence: 99%

Synchronous scanning phosphorimetry for the selective determination of chrysene: a metrological study

Cunha¹,

Ziolli²,

Aucélio³

2010

Quím. Nova

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Recebido em 28/9/09; aceito em 7/2/10; publicado na web em 21/5/10 Room-temperature phosphorimetry was used to quantify trace levels of chrysene in sugar-cane spirits and in fish bile. A selective phosphorescence enhancer (AgNO 3 ) and synchronous scanning allowed the detection of ng amounts of chrysene. Accuracy (113 ± 17%) and selectivity was evaluated using the CRM-NIST-1647d -Priority Pollutant Polycyclic Aromatic Hydrocarbons in acetonitrile. Analysis of sugar-cane spirit samples enabled recovery of 108 ± 18% which agreed with the one achieved using HPLC. Method's uncertainty was equivalent to 3.4 ng of the analyte, however, the analyte pre-concentration (SPE) improved sensibility and minimized the relative uncertainty. Characterization and homogeneity studies in fish bile were also performed.

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Selective heavy-atom perturbation for analysis of complex mixtures by room-temperature phosphorimetry

Cited by 110 publications

References 26 publications

Determination of benzo[b]naphtho[2,3-d]thiophene (BNT) in sediments using selective heavy atom induced room-temperature phosphorimetry

Determination of benzo[b]naphtho[2,3-d]thiophene (BNT) in sediments using selective heavy atom induced room-temperature phosphorimetry

Room-Temperature Phosphorimetry of Salicylic Acid in Pharmaceutical Powders

Synchronous scanning phosphorimetry for the selective determination of chrysene: a metrological study

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