Applying the voltammetry of microparticles to assess the metal ion excess following a precipitation reaction: the determination of arsenic

2019 ◽  
Vol 23 (12) ◽  
pp. 3225-3229
Author(s):  
Javier Espinoza-Vergara ◽  
Jorge Pavez ◽  
Evelyn Gonzalez ◽  
Cristián Ramirez ◽  
Maritza Páez ◽  
...  
Keyword(s):  
Metal Ion ◽  
Precipitation Reaction ◽  
Voltammetry Of Microparticles

Green synthesis of gold nanoparticles and its application for the trace level determination of painter's colic

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16284-16291 ◽  
Author(s):  
Chelladurai Karuppiah ◽  
Selvakumar Palanisamy ◽  
Shen-Ming Chen ◽  
R. Emmanuel ◽  
K. Muthupandi ◽  
...  
Keyword(s):  
Analytical Chemistry ◽  
Heavy Metal ◽  
Green Synthesis ◽  
Metal Ion ◽  
Trace Level ◽  
Ion Sensing ◽  
Metal Ion Sensing ◽  
Heavy Metal Ion Sensing ◽  
Trace Level Determination

The green synthesis of metal nanoparticles is found to be more attractive in various disciplines, including in analytical chemistry for heavy metal ion sensing.

Determination of Solution Ions by Electrospray Mass Spectrometry

1994 ◽  
Vol 48 (6) ◽  
pp. 655-661 ◽  
Author(s):  
George R. Agnes ◽  
Gary Horlick
Keyword(s):  
Mass Spectrometry ◽  
Metal Ion ◽  
Gas Flow ◽  
Electrospray Mass Spectrometry ◽  
Negative Ion ◽  
Molecular Forms ◽  
Mass Spectral ◽  
Oxo Anions ◽  
Electrospray Source

Spectral results are presented illustrating the capability of electrospray mass spectrometry (ES-MS) for the determination of the composition of solution samples. The solution components that can be determined include the elemental and molecular forms of anions and cations. Three modes of positive-ion ES-MS are described: the ion cluster mode, the metal-ion mode, and an intermediate mode. The modes are established by operating the electrospray source at specific voltages and curtain gas flow rate values, and each mode provides a unique mass spectral picture of the solution components with primary focus on cationic species (i.e., metal ions). Results are also presented for operation of the electrospray source in negative-ion mode. In this mode both elemental anions (i.e., halides) and molecular anions (i.e., oxo-anions) can be determined.

scholarly journals Determination of the Ratios of Ligands to Metal Ion of some Metal Complexes of Triazoles by Using Eleetronie Speetra in Organie Solvents

2004 ◽  
Vol 1 (1) ◽  
pp. 110-115
Author(s):  
Baghdad Science Journal
Keyword(s):  
Solid State ◽  
Metal Complexes ◽  
Electronic Spectra ◽  
Metal Ion ◽  
The Other ◽  
Molar Ratio ◽  
Other Hand

We found that 4,5- diphenyl- 3(2- propynyl) thio- 1??-triazole [1? forms a complex with Pd (11) ion of ratio 1:1 which absorbs light in CH2CI2 at 400 nm, and 4,5- diphenyl- 3(2- propenyl) thio- 1,2,4- triazole [II] forms complexes with Pd (II) ion of ratio 1:1 which absorbs light at 390 nm, and of ratio 2:1 which absorbs light at 435 nm. On the other hand, we found that the new derivative 4- phenyl- 5( p- amino phenyl) -3- mercapto- 1,2,4- triazole ?111? forms complexes with Cu (II) ion of the ratio 1:1 which absorbs light at 380 nm, with Ni (II) ion of the ratio 3:1 which absorbs light at 358 nm; and with Co (11) ion of the ratio 3.2:1 which absorbs light at 588 nm. The ratio of the complexes were determined by measuring the electronic spectra of the complexes in CH2G2 and (CH^NCHO at different concentrations ofthe ligands and f?xed ' •' of the metal ion in every case, then applying the molar ratio plots on the data. Our results were confirmed by precipitating most ofthe above complexes in solid state, and then each complex was analyzed elementally.

scholarly journals Voltammetric Methods in Metallothionein Research

2005 ◽  
Vol 3 (1-2) ◽  
pp. 43-53 ◽  
Author(s):  
Ivana Šestáková ◽  
Tomáš Navrátil
Keyword(s):  
Metal Ion ◽  
Composite Electrode ◽  
Differential Pulse ◽  
Carbon Composite ◽  
Ion Transfer ◽  
Adsorbed State ◽  
Carbon Composite Electrode ◽  
Pulse Voltammetry ◽  
Voltammetric Methods

The application of voltammetric methods using different rates of polarisation on HMDE reveal inert or labile behaviour of Cd- or Zn- complexes in the presence of excessive cadmium or zinc ions in solution. This phenomenon was demonstrated first on the simplest phytochelatin – complex of peptide(γ-Glu-Cys)2Glywith cadmium, later on rabbit liver metallothioneins –Cd7MTin the presence of cadmium andCd5Zn2MTin the presence of zinc. Voltammetric methods can distinguish between labile and inert complexes present simultaneously and therefore could elucidate their role in reactions of metal ion transfer.Another method using different rates of polarisation – elimination voltammetry with linear scan – proved that S-tetracoordinated complexes of Cd(II) or Zn(II) in the above-mentioned metallothioneins on HMDE are reduced in the adsorbed state. This implies the possibility of increasing the sensitivity of identification or determination of the above complexes. On carbon composite electrode, similar behaviour of Cd-complexes as on HMDE was observed using differential pulse voltammetry.

scholarly journals Determination of Traces of Pd(II) in Spiked Samples by Using 3,4-Dihydroxybenzaldehydeisonicotinol-hydrazone as a Chelating Agent with UV Visible Spectrophotometer

2011 ◽  
Vol 8 (1) ◽  
pp. 217-225 ◽  
Author(s):  
S. Lakshmi Narayana ◽  
C. Ramachandraiah ◽  
A. Varada Reddy ◽  
Dongyeun Lee ◽  
Jaesool Shim
Keyword(s):  
Metal Ion ◽  
Regression Coefficient ◽  
Chelating Agent ◽  
Molar Absorptivity ◽  
Inexpensive Method ◽  
Colored Complex ◽  
Major Cations ◽  
Uv Visible ◽  
Metal Ligand

A simple, rapid, sensitive and inexpensive method has been developed for the determination of trace amounts of palladium(II) using 3,4-dihydroxybenzaldehydeisonicotinoylhydrazone (3,4-DHBINH). The metal ion gives a yellow colored complex with 3,4-DHBINH in acetate buffer of pH 3.0 with 1:1 (metal: ligand) composition. The complex shows maximum absorption at 380 nm. Beer’s law is obeyed in the range 0.5-20.0 ppm of Pd(II). The molar absorptivity, Sandell’s sensitivity and detection limit were found to be 0.53×104L mol-1cm-1, 0.02 μg cm-2and 0.0948 μg mL-1, respectively. The correlation coefficient and regression coefficient of the Pd(II)-3,4-DHBINH complex were 1.08 and 0.04 respectively. Major cations and anions did not show any interference. Anti-microbial activity of the Pd(II)-3,4-DHBINH has been studied. The developed method has been successfully applied to the analysis of Pd(II) in spiked samples. Comparing the results with those obtained using an atomic absorption spectrophotometer tested the validity of the method

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