Sub-millimolar determination of formalin by pulsed amperometric detection

Ngamchana, Sirimarn; Surareungchai, Werasak

doi:10.1016/j.aca.2004.01.018

Cited by 30 publications

(16 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Finally, we tested the electrode in the solution of 0.01mol/L [Fe(CN) 6 ] 3-/4-. If the difference of peak potential was below 80mV, the electrode conformed to the experimental requirements [14].…”

Section: B Electrode Treatmentmentioning

confidence: 99%

etection of Salt Content in Raw Milk on a Gold Electrode through Cyclic Voltammetry

Chen¹,

Bei-bei²,

Lai³

et al. 2018

JOAAT

View full text Add to dashboard Cite

The relationship model of chloride ion content and oxidation peak current was established by the study of curve obtained by using gold electrodes to test cyclic voltammetry in raw milk containing different chloride ion concentrations. The study found that with the increased of chlorine ion content, the potential of the oxidation peak was in positive correlation and the current of the peak increased dramatically. The golden matter appeared in sample liquid. In addition, we observed that corrosion in gold electrode, and the characteristic peak of Au-Cl -1 appeared at 269cm -1 by using SEM and SERS to detect the reaction electrode. The results showed that the gold electrode had the anodized dissolution because of the presence of chloride ion. The prediction model of chloride ion content with a detection limit of 0.05g/L was established by the least square method. The recovery rate and relative standard deviation of the method were respectively from 91.0% to 106.0% and from 3.4% to 4.2%. The method is suitable for rapid detection of milk mixed with salt. 1 Huang Gan-hui, born in 1967, is a professor in Nanchang University, who acquired his doctorate degree from the same university specializing in food engineering.Chen Xing-guang, born in 1993, is now studying food engineering in Nanchang University. He focuses his research on food safety and electrochemistry.Chu Bei-bei is now Studying food engineering in Nanchang University. She focuses her research on food safety and electrochemistry.Lai Li-zhi, born in 1991, is now studying food engineering in Nanchang University. She focuses her research on food safety and electrochemistry.Peng Hui-feng, born in 1994, is now studying food engineering in Nanchang University. He focuses his research on food safety and electrochemistry.Deng Dan-wen is a Professor in Nanchang University specializing in food engineering. She focuses her research on food safety and electrochemistry.

show abstract

Section: B Electrode Treatmentmentioning

confidence: 99%

etection of Salt Content in Raw Milk on a Gold Electrode through Cyclic Voltammetry

Chen¹,

Bei-bei²,

Lai³

et al. 2018

JOAAT

View full text Add to dashboard Cite

show abstract

“…However, electrode fouling processes and low electrochemical activity of many important molecules are the main drawbacks. Pulsed amperometric detection (PAD) has the possibility of overcoming both difficulties and has been used for a wide variety of compounds [50][51][52]. PAD consists of a simple three potential waveform where the electrode is first cleaned at a high positive potential (to oxidize the electrode surface), reactivated at a negative potential (to dissolve/reduce the surface oxide), and then used to detect the analyte at a moderate positive potential.…”

Section: Introductionmentioning

confidence: 99%

Application of microchip‐CE electrophoresis to follow the degradation of phenolic acids by aquatic plants

Ding

Garcı́a

2006

Electrophoresis

View full text Add to dashboard Cite

In this paper, we describe the separation and detection of six phenolic acids using an electrophoretic microchip with pulsed amperometric detection (PAD). The selected phenolic acids are particularly important because of their biological activity. The analysis of these compounds is typically performed by chromatography or standard CE coupled with a wide variety of detection modes. However, these methods are slow, labor intensive, involve a multistep solvent extraction, require skilled personnel, or use bulky and expensive instrumentation. In contrast, microchip CE offers the possibility of performing simpler, less expensive, and faster analysis. In addition, integrated devices can be custom-fabricated and incorporated with portable computers to perform on-site analysis. In the present report, the effect of the separation potential, buffer pH and composition, injection time and PAD parameters were studied in an effort to optimize both the separation and detection of these phenolic acids. Using the optimized conditions, the analysis can be performed in less than 3 min, with detection limits ranging from 0.73 microM (0.10 microg/mL) for 4-hydroxyphenylacetic acid to 2.12 microM (0.29 microg/mL) for salicylic acid. In order to demonstrate the capabilities of the device, the degradation of a mixture of these acids by two aquatic plants was followed using the optimized conditions.

show abstract

“…Various analytical methods have been reported to determine formaldehyde in vapors [1,2] or especially in liquid phase [3][4][5]. Amperometric sensors in potentiostatic mode using noble metal as electrodes deposited on Nafion membranes are widely reported [6][7][8].…”

Section: Introductionmentioning

confidence: 99%