Réactions colorées de stéroĭdes

Wachsmuth, H; Koeckhoven, L. Van

doi:10.1016/s0003-2670(00)88239-2

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…Alizarin red sulphonate (ARS) method (19) 2,4-Dinitro-1fluorobenzene (DNFB) method ( Results shown in Table (7) confirm that the present method was rapid, simple, has low detection limit, wide range for determination and cheap since it does not require neither organic solvent nor solvent extraction.…”

Section: Analytical Parametermentioning

confidence: 54%

“…Various  acceptors have been used for the determination of amines spectrophotometrically via n- CT-complex formation reaction with 2,4,7-trinitrofluorenone (5) , p-benzoquinone (6) , 2,6-dichloro-pbenzoquinone (7) , trinitrobenzene (8) , 2,3,5,6-tetrachloro-p-benzoquinone (Chloranil) (9)(10)(11)(12) , 2,3,5,6-tetrafluoro-p-benzoquinone (Fluoranil) (13) , 2,3dichloro-5,6-dicyano-p-benzoquinone (DDQ) (14,15) and 2,3,5,6tetrabromo-p-benzoquinone (Bromanil) (16) . Benzylamine was determined spectrophotomertically by its reaction with Cu-NTA complex in aqueous solution leading to increase the absorbance at  max 832 nm with accuracy of 99% and RSD < 4.6% (17) .…”

Section: Introductionmentioning

confidence: 99%

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Spectrophotometric Determination of Microgram Amounts of Aliphatic Amines with Quinalizarin

Al-Ghabsha¹,

Al-Delymi²

2009

J.Edu.Sci.

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A simple, rapid and sensitive spectrophotometric method for the determination of aliphatic amines was developed. The method is based on the proton transfer reaction with quinalizarin reagent in aqueous neutral solution to form violet product which shows maximum absorbance at 560 nm with molar absorptivity ranged between 3600 l.mol -1 .cm -1 for terbutyl amine to 6720 l.mol -1 .cm -1 for sec-butyl amine. The accuracy (average recovery) of the method was 100.15% and the precision (RSD) was less than 3.1%. The effect of various compounds on the determination of aliphatic amines has been studied. The nature and stability constant of the products have been estimated.

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Section: Analytical Parametermentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Spectrophotometric Determination of Microgram Amounts of Aliphatic Amines with Quinalizarin

Al-Ghabsha¹,

Al-Delymi²

2009

J.Edu.Sci.

View full text Add to dashboard Cite

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“…Procedure 11-A procedure of Wachsmuth and Koeckhoven ( 2 ) for the colorimetric analysis of amphetamine was used. Amphetamine reacts with 2,5-hexanedione in acetic acid to form 141'-phenylisopropyl)-2.5-dimethylpyrrole, which gives a green fluorescence under UV radiation.…”

mentioning

confidence: 99%