New insights into the effect of pH on the mechanism of ofloxacin electrochemical detection in aqueous solution

2019 ◽  
Vol 21 (29) ◽  
pp. 16282-16287 ◽  
Author(s):  
Ting Liu ◽  
Qiang Xue ◽  
Jianbo Jia ◽  
Fei Liu ◽  
Shengzhang Zou ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Detection ◽  
Practical Application ◽  
Effect Of Ph ◽  
Optimal Ph

We first found that identifying the protonation status and polarity of the target pollutant helped to rapidly find an optimal pH condition for its electrochemical detection, which promoted practical application.

A conductive silver membrane for electrochemical detection of free chlorine in aqueous solution

2021 ◽  
pp. 130724
Author(s):  
Yung–Tai Chiang ◽  
Shih–Cheng Chou ◽  
Bo–Yao Sun ◽  
Pu–Wei Wu
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Detection ◽  
Free Chlorine

scholarly journals Effect of pH on the Conformation of Inclusion Complexes between β-Lactam Antibiotics and β-Cyclodextrins in Aqueous Solution

2010 ◽  
Vol 67 (3) ◽  
pp. 192-197 ◽  
Author(s):  
Miho YUKAWA ◽  
Hanae MORIWAKI ◽  
Taichi MURAKAMI ◽  
Hirohito IKEDA ◽  
Yukiko IWASE ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Inclusion Complexes ◽  
Effect Of Ph

Performance of poly-o-phenylenediamine and its carbon dot composite electrode in the removal of Cu2+ from its aqueous solution

2021 ◽  
pp. 2151037
Author(s):  
Yu Meng ◽  
Qing Zhong ◽  
Arzugul Muslim
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Reduction ◽  
Composite Electrode ◽  
Reduction Process ◽  
Order Kinetic ◽  
Carbon Dot ◽  
First Order ◽  
Oxidation Reduction ◽  
Order Kinetic Model ◽  
Optimal Ph

Because −NH2 and −NH− in poly-[Formula: see text]-phenylenediamine (P[Formula: see text]PD) can interact strongly with the empty orbitals of Cu to show unique electrochemical activity, P[Formula: see text]PD is suitable for the removal of Cu[Formula: see text] by electrochemical oxidation–reduction process. In this study, with P[Formula: see text]PD and its carbon dot composite (CDs/P[Formula: see text]PD) as working electrodes, the electrochemical reduction and removal of Cu[Formula: see text] in the aqueous solution were carried out with the potentiostatic method. According to effects of voltage, pH of the solution, initial concentration of Cu[Formula: see text], and electrochemical reduction time on the Cu[Formula: see text] removal, the Cu[Formula: see text] removal ratios of P[Formula: see text]PD and CDs/P[Formula: see text]PD were up to 64.69% and 73.34%, respectively, at −0.2 V and the optimal pH. Additionally, results showed that these processes were in line with the quasi-first order kinetic model. Both P[Formula: see text]PD and CDs/P[Formula: see text]PD showed good reproducibility in six cycles. After five times of repeated usage, the regeneration efficiencies of P[Formula: see text]PD and CDs/P[Formula: see text]PD dropped to 77.04% and 79.36%, respectively.

scholarly journals Effect of pH on Biosorption Ion Cd(II) in Solutions using Lengkuas Merah (Alpinia Gralanga)

2018 ◽  
Vol 1 (1) ◽  
pp. 31
Author(s):  
Ahmad Faris Fauzi ◽  
Lisa Utami
Keyword(s):  
Waste Water ◽  
Aqueous Solution ◽  
Low Cost ◽  
Effect Of Ph ◽  
Biosorption Capacity ◽  
Optimum Ph

The biosorption characteristic of Cd(II) ions from aqueous solution using Lengkuas Merah (Alpinia Gralanga) were investigated as a function of pH. The maximum biosorption capacity of a Lengkuas Merah (Alpinia Gralanga) for Cd(II) was found to be 18,37 mg/L and 91,85% at optimum pH was 10. At pH 2 to 10 the biosorption of Cd ions tends to increase. The result showed that the lengkuas merah  can be evaluated as an alternative biosorbent to treatment waste water containing Cd(II). A Lengkuas Merah is low cost and has considerable high biosorption capacity.

Electrochemical Sensor for Determination of Pb2+ Based on Gold Nanoparticles

2020 ◽  
Vol 20 (6) ◽  
pp. 3356-3360
Author(s):  
Hao Yong Yin ◽  
Yi Fan Zheng ◽  
Ling Wang
Keyword(s):  
Gold Nanoparticles ◽  
Electrochemical Sensor ◽  
Electrochemical Detection ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Room Temperature ◽  
Low Cost ◽  
Differential Pulse ◽  
Practical Application

We report the formation of gold nanoparticles on indium tin oxide conducting glass (ITO) surface via electrodeposition method at room temperature. The prepared nano-Au electrodes has been fabricated for sensitive detection of Pb2+, and showed highly selective response toward Pb2+. The electrochemical detection of Pb2+ were determined by differential pulse stripping voltammetric (DPSV). The nano-Au electrochemical sensor could detect Pb2+ from 0.5 to 10 μM with detection limits of 0.06 μM (S/N= 3) and sensitivity of 0.27996 mA μM−1. The proposed sensor is simple, reliable, sensitive, selective, and low-cost, thus holds potential for practical application in Pb2+ detection.

THE DISSOCIATION OF α- AND β-LIPOVITELLIN IN AQUEOUS SOLUTION: PART I. EFFECT OF pH, TEMPERATURE, AND OTHER FACTORS

1962 ◽  
Vol 40 (3) ◽  
pp. 363-372 ◽  
Author(s):  
R. W. Burley ◽  
W. H. Cook
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Aqueous Solutions ◽  
Thermodynamic Data ◽  
Equilibrium Constants ◽  
Effect Of Ph ◽  
Reversible Dissociation ◽  
Lipoprotein Concentration ◽  
Irreversible Aggregation ◽  
Increasing Temperature

The effect of pH, temperature, ionic strength, and lipoprotein concentration on the reversible dissociation of α- and β-lipovitellin in aqueous solutions above pH 6 has been examined by ultracentrifugal measurements. Under otherwise similar conditions α- and β-lipovitellin are 50% dissociated at pH 10.5 and 7.8, respectively. Both lipovitellins undergo an irreversible aggregation above about pH 11; β-lipovitellin is sometimes converted to a non-dissociable form upon aging. Dissociation of both lipovitellins decreases with increasing ionic strength and increasing temperature. Although the ultracentrifugal method has limitations, provisional equilibrium constants and thermodynamic data were obtained from it that are comparable with those obtained for certain protein systems.

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