Highly selective speciation and fluorimetric determination of Se(iv) in infant formulas using micelle-capped nile blue A

RSC Advances ◽  
2013 ◽  
Vol 3 (44) ◽  
pp. 21570 ◽  
Author(s):  
Jinghui Zhu ◽  
Shaopu Liu ◽  
Zhongfang Liu ◽  
Yuanfang Li ◽  
Man Qiao ◽  
...  
Keyword(s):  
Nile Blue ◽  
Infant Formulas ◽  
Fluorimetric Determination ◽  
Nile Blue A

Kinetic determination of trace levels of selenium(IV) and total selenium by Nile Blue A/hydrogen peroxide method

1998 ◽  
Vol 128 (1-2) ◽  
pp. 43-48 ◽  
Author(s):  
Gordana A. Milovanović ◽  
Radivoj B. Petronijević ◽  
Mira M. Čakar
Keyword(s):  
Hydrogen Peroxide ◽  
Nile Blue ◽  
Kinetic Determination ◽  
Nile Blue A ◽  
Total Selenium ◽  
Peroxide Method

Long-Wavelength Fluorimetric Determination of Food Antioxidant Capacity Using Nile Blue as Reagent

2011 ◽  
Vol 59 (6) ◽  
pp. 2235-2240 ◽  
Author(s):  
J. Godoy-Navajas ◽  
M. P. Aguilar Caballos ◽  
A. Gómez-Hens
Keyword(s):  
Antioxidant Capacity ◽  
Nile Blue ◽  
Fluorimetric Determination ◽  
Long Wavelength

A sensitive three-signal assay for the determination of PFOS based on the interaction with Nile blue A

2018 ◽  
Vol 10 (25) ◽  
pp. 3052-3058 ◽  
Author(s):  
Qian Chen ◽  
Zhen Cheng ◽  
Lingling Du ◽  
Panpan Zhu ◽  
Kejun Tan
Keyword(s):  
Nile Blue ◽  
Nile Blue A ◽  
Perfluorooctanesulfonic Acid

In this work, a sensitive three-signal assay of perfluorooctanesulfonic acid (PFOS) was proposed.

scholarly journals Determination of lisinopril in pharmaceuticals by a kinetic spectrophotometric method

2012 ◽  
Vol 77 (10) ◽  
pp. 1437-1442 ◽  
Author(s):  
Mira Cakar ◽  
Gordana Popovic
Keyword(s):  
Hydrogen Peroxide ◽  
Spectrophotometric Method ◽  
Nile Blue ◽  
Borate Buffer ◽  
Nile Blue A ◽  
Tangent Method ◽  
Kinetic Spectrophotometric ◽  
Detection And Quantification

A kinetic spectrophotometric method for determination of lisinopril in pharmaceuticals has been developed. The method is based on activator action of lisinopril on Cu(II) ions catalysing the oxidation of nile blue A with hydrogen peroxide in borate buffer (pH 9.3). A decrease of the absorbance was recorded at 635 nm for 5 min at 25?C. The linearity was established applying the tangent method within the concentration range of lisinopril from 0.8-6.4 ?g mL-1, the detection and quantification limits being 0.158 ?g mL-1 and 0.480 ?g mL-1, respectively. The method has been successfully applied in three brands of tablets containing lisinopril alone or in combination with hydrochlorothiazide.

The fluorimetric determination of cerium and terbium

1989 ◽  
Vol 54 (3) ◽  
pp. 616-621 ◽  
Author(s):  
Záviš Holzbecher
Keyword(s):  
Rare Earth ◽  
Detection Limit ◽  
Rare Earth Elements ◽  
Fluorimetric Determination ◽  
Fluorescence Maximum ◽  
Relative Standard ◽  
And Shifts ◽  
Hcl Medium ◽  
Fold Excess

It has been found that phosphoric acid decreases the first excitation maximum of Ce(III) at 256 nm, increases the second excitation maximum at 297 nm and shifts the fluorescence maximum from 350 to 346 nm. Under optimum conditions, with λexc = 297 nm and λem = 346 nm, Ce(III) can be determined fluorimetrically with a detection limit of 1.2 ng ml-1 in 12M-H3PO4 medium. No interference was observed from a 20-200 fold excess of HCl, H2SO4, Na, K, NH4+, Al and the rare earth elements. HNO3 interferes and Ce(IV) and Fe(III) interfere strongly. It follows from the stereofluorograms of Ce and Tb that the spectra of the two elements are practically independent. The detection limit for Tb(III) in 0.02-2.5M-H2SO4 medium for λexc = 222 nm and λem = 494 nm is 33 ng ml-1. No interference was observed from a 5-20 fold excess of Al3+ and the other rare earth elements. The determination is slightly less sensitive in H3PO4 or HCl medium. The relative standard deviation of the measurement for 10 ng ml-1 Ce(III) or 50 ng ml-1 Tb(III) is about 3%.

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