scholarly journals Selective Preconcentration and Separation of a Trace Amount of Copper(II) with Poly(N-(8-hydroxy-5-quinolylmethyl)-4-aminomethylstyrene) Resin.

1995 ◽  
Vol 11 (2) ◽  
pp. 313-315 ◽  
Author(s):  
Xian Ren CHEN ◽  
Yuqi FENG ◽  
Hisanori IMURA ◽  
Kazuhisa HIRATANI ◽  
Kousaburo OHASHI
Keyword(s):  
Trace Amount ◽  
Selective Preconcentration

Synthesis and solvatochromic studies of 2- amino-3-phenolazo1-(4-sulfophenyl)-3-methyi-5-pyrozolone and use it for the determination of trace amount of Nickel (II) in blood samples

2016 ◽  
Vol 5 (10) ◽  
pp. 4920
Author(s):  
Amar M. Ali ◽  
Hussain. J. Mohammed*
Keyword(s):  
Stability Constant ◽  
Trace Amount ◽  
Benzenesulfonic Acid ◽  
Determination Method ◽  
Blood Samples ◽  
Determination Of Nickel ◽  
Normal Human ◽  
The Stability ◽  
Normal Human Blood

A new, simple, sensitive and rapid spectrophotometric method is proposed for the determination of trace amount of Nickel (II). The method is based on the formation of a 1:2 complex with 4-(4-((2-hydroxy-6-nitrophenyl) diazenyl) -3-methyl-5-oxo-2, 5-dihydro-1H-pyrazol-1-yl) benzenesulfonic acid (2-ANASP) as a new reagent is developed. The complex has a maximum absorption at 516 nm and εmax of 1. 84 X 105 L. mol-1. cm-1. A linear correlation (0. 25 – 4. 0μg. ml-1) was found between absorbance at λmax and concentration. The accuracy and reproducibility of the determination method for various known amounts of Nickel (II) were tested. The results obtained are both precise (RSD was 1. 2 %) and accurate (relative error was 0. 787 %). The effect of diverse ions on the determination of Nickel (II) to investigate the selectivity of the method were also studied. The stability constant of the product was 0. 399 X 106 L. mol-1. The proposed method was successfully applied to the analysis of diabetes blood and normal human blood. 

Photoisomerization-induced patterning of ion-pairing materials based on anionic azobenzene and its complex with a fluorescent π-electronic system

2021 ◽  
Vol 57 (35) ◽  
pp. 4287-4290
Author(s):  
Ryohei Yamakado ◽  
Issei Kitamura ◽  
Mitsuo Hara ◽  
Shusaku Nagano ◽  
Takahiro Seki ◽  
...  
Keyword(s):  
Surface Tension ◽  
Mass Transport ◽  
Trace Amount ◽  
Ion Pairs ◽  
Ion Pairing ◽  
Electronic System ◽  
Large Mass ◽  
System P ◽  
The Difference

Large mass transport driven by the difference in the photoisomerization-induced surface tension was demonstrated in ion pairs, enabling fluorescence patterning using a trace amount of photoisomerized anions in complexation with a π-electronic system.

Selective Preconcentration of U(VI) and Th(IV) in Trace and Macroscopic Levels Using Malonamide Grafted Polymer from Acidic Matrices

2005 ◽  
Vol 150 (3-4) ◽  
pp. 297-304 ◽  
Author(s):  
Chinthalapati Siva Kesava Raju ◽  
Mandakolathur S. Subramanian
Keyword(s):  
Grafted Polymer ◽  
Selective Preconcentration

Detection of trace amount of arsenic in groundwater by laser-induced breakdown spectroscopy and adsorption

2014 ◽  
Vol 56 ◽  
pp. 299-303 ◽  
Author(s):  
A.F.M.Y. Haider ◽  
M. Hedayet Ullah ◽  
Z.H. Khan ◽  
Firoza Kabir ◽  
K.M. Abedin
Keyword(s):  
Trace Amount ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Arsenic In Groundwater ◽  
Laser Induced Breakdown
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