Photoacoustic spectroscopic studies of methylene blue and malachite green adsorbed on silica

Plichon, V.; Leliévre, Dominique; Liboux, M. Le; Fournier, D.; Cecile, J.-L.; Boissay, S.

doi:10.1016/s0003-2670(01)85320-4

Analytica Chimica Acta

1982

DOI: 10.1016/s0003-2670(01)85320-4

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Photoacoustic spectroscopic studies of methylene blue and malachite green adsorbed on silica

V. Plichon¹,

Dominique Leliévre²,

M. Le Liboux³

et al.

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1983

1988

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Cited by 3 publications

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“…But it presents the advantage to work directly at the powder-water interface, that is in conditions much more similar to flotation conditions. It must be pointed out that only relative measurements are obtained with all three techniques and before we experimented them on sphalerite, we tested them on a model system of dyes adsorbed on silica with known surface concentrations (1).…”

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confidence: 99%

Applications of Photoacoustic and Diffuse Reflectance Spectroscopy in Minerals Flotation

et al. 1983

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confidence: 99%

Applications of Photoacoustic and Diffuse Reflectance Spectroscopy in Minerals Flotation

et al. 1983

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Synthese und UV‐spektroskopische Charakterisierung von Carbeniumionen an Aerosil

1988

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Synthesis and UV‐spectroscopic Characterization of Carbenium Ions on Aerosil The interaction of aerosil with various triphenylmethyl derivatives in the cationic vinyl polymerization in 1,2‐dichloroethane was studied. The adsorption of the triphenylmethylium ions onto aerosil surfaces strongly depends on both the type of substituents (R  CH3, OCH3, Cl, H and NO2) and the nature of the counter anion (SbCl6⊖, FeCl4⊖, SnCl5⊖, HSO4⊖, SO42⊖, F⊖, Cl⊖, Br⊖, CF3COO⊖, N3⊖ and SCN⊖). The binding of the triphenylmethylium ions with aerosil occurs via nucleophilic anions such as halides. Counter anions derived from metal halides as MtXn+1⊖ are not able bind on aerosil. Covalent compounds as triphenylmethyl halides are ionized by the acidic aerosil surface. The influence of substituents at the triphenylmethylium ion, the type of counter anions and the influence of water traces on surface — ionization are discussed.

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Simple, Versatile, Pseudo “Double Beam” Photoacoustic Spectrometer

et al. 1984

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SIHPLE, VERSATII,E, PSEUDO "DOUBLE BEAY" PklOl'OhCO1IS'~IC SPECTROMETER KEY WORDS : P h o t o a c o u s t i c s p e c t r o m e t e r . . I . _I. .. ,. M. L e Lihoux*, R . Nahoum", C . P i c h o n " a n d V . I ' l i r h o n * L a b o r n t o i r e d ' 0 p t i q u e P h y s i q u e , ESPCI (Ell 5 CNKS) 10, r u e V a u q u c l i n , 75231 P a r i s Ccdcx 05 -F r a n c c ** L s b o r a t o i r c d e Chimie A n a l y t i q u e d c s M i l i c u x K 6 a c t i o n n e l s ESPCI, (ERA 953) 10, r u e V d u q u e l i n , 75231 P a r i s Ccldex 05 -r a n r e ABSTRACT --W e d e s c r i b e i n t h i s p a p c r a "pseudo-double l x~c i m " pliotoa c o u s t i c s p e c t r a m c L e r u s i n g a wide a p e r t u r c monochrc.m.itk,r ( l -/ Z ) 2nd a v e r y s e n s i t i v e cell. The dorihle sign;Lls r i -q u i r c d t o g e t tlie n o r m a l i z e d v a l u e , i . e . , t h e s a m p l e signal and ;i c a r b o n b l a c k r c f c r r n c c s i g n a l , 'ire o b t a i n e d by a slow ( 1 . 7 1-11.) a l t e r n a t i n g movcnient of t h e two c e l l s s u p p o r t , t h e samplia m d the r c f c r e r i c c b e i n g , i l t c r n a t e l y placed at t h e f o c u s p o i n t of t h r hcam ( 0 . 7 nrn), n 5 nm b a n d w i d t h ) and n o r m a l i z a t i o n i n n wide s p e c t r a l r a n g e .s i g n a l -L o -n o i s e r a t i o (1200 f o r H0203 a t 450 nm w i t h 2227

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Photoacoustic spectroscopic studies of methylene blue and malachite green adsorbed on silica

Cited by 3 publications

References 12 publications

Applications of Photoacoustic and Diffuse Reflectance Spectroscopy in Minerals Flotation

Applications of Photoacoustic and Diffuse Reflectance Spectroscopy in Minerals Flotation

Synthese und UV‐spektroskopische Charakterisierung von Carbeniumionen an Aerosil

Simple, Versatile, Pseudo “Double Beam” Photoacoustic Spectrometer

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