A simple high-throughput headspace gas chromatographic method for the determination of dissolved oxygen in aqueous samples

Zhang, Shuxin; Jiang, Ruming; Yun, Na; Rong, Pengfei; Chai, Xin‐Sheng

doi:10.1016/j.chroma.2019.460399

Cited by 3 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it should be noticed that the higher temperature will lead to higher water vapor pressures, which not only may affect the separation performance of the GC column, but also create a corrosion problem for the sampling channel when a strongly acidic medium is used. [26][27] Figure 4 illustrated the GC signal for CO 2 after a 4 min reaction time between carbonate and sulfuric acid at temperatures between 40 and 70°C. Companying with the increase of temperature, the GC signal count increased from 168 at 40°C to 180 at 45°C at first and then keep stable.…”

Section: Effect Of Equilibration Temperaturementioning

confidence: 99%

Headspace Gas Chromatographic Method for Carbonate Content Determination in Layered Double Hydroxides

Liu

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

The determination of carbonate content is the basic procedure for studies related to layer double hydroxides (LDHs). This paper reports a rapid and accurate headspace gas chromatographic (HS-GC) technique for the determination of carbonate content in LDHs. The content of carbonate was expressed by the amount of CO 2 generated by the reaction of sulfuric acid and carbonate, which can be measured by HS-GC technique using a thermal conductivity detector. It was found that a complete conversion of carbonate to CO 2 can be achieved at 45°C for about 4 min and a sulfuric acid dosage of 200 μL in the headspace vial. Under optimized conditions, the limit of detection and relative standard deviation of HS-GC method is 0.79 μmol and 1 %, respectively.

show abstract

Section: Effect Of Equilibration Temperaturementioning

confidence: 99%

Headspace Gas Chromatographic Method for Carbonate Content Determination in Layered Double Hydroxides

Liu

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…In chemical DO sensing, Winkler titration is the most accurate test method, but the procedures are complicated, making it difficult to realize in real-time monitoring [10]. Amperometric devices based on the oxidation-reduction reaction between the Clark electrode and oxygen molecules in water are commonly used in electrochemical method-based sensors [11,12]. However, the electrode will keep aging, and the sensor needs frequent calibration.…”

Section: Introductionmentioning

confidence: 99%

Ratiometric Optical Fiber Dissolved Oxygen Sensor Based on Fluorescence Quenching Principle

Zhao

Zhang

Jin

et al. 2022

Sensors

View full text Add to dashboard Cite

In this study, a ratiometric optical fiber dissolved oxygen sensor based on dynamic quenching of fluorescence from a ruthenium complex is reported. Tris(4,7-diphenyl-1,10-phenanthrolin) ruthenium(II) dichloride complex (Ru(dpp)32+) is used as an oxygen-sensitive dye, and semiconductor nanomaterial CdSe/ZnS quantum dots (QDs) are used as a reference dye by mixing the two substances and coating it on the plastic optical fiber end to form a composite sensitive film. The linear relationship between the relative fluorescence intensity of the ruthenium complex and the oxygen concentration is described using the Stern–Volmer equation, and the ruthenium complex doping concentration in the sol-gel film is tuned. The sensor is tested in gaseous oxygen and aqueous solution. The experimental results indicate that the measurement of dissolved oxygen has a lower sensitivity in an aqueous environment than in a gaseous environment. This is due to the uneven distribution of oxygen in aqueous solution and the low solubility of oxygen in water, which results in a small contact area between the ruthenium complex and oxygen in solution, leading to a less-severe fluorescence quenching effect than that in gaseous oxygen. In detecting dissolved oxygen, the sensor has a good linear Stern–Volmer calibration plot from 0 to 18.25 mg/L, the linearity can reach 99.62%, and the sensitivity can reach 0.0310/[O2] unit. The salinity stability, repeatability, and temperature characteristics of the sensor are characterized. The dissolved oxygen sensor investigated in this research could be used in various marine monitoring and environmental protection applications.

show abstract

Physicochemical and microbial pollution of a reservoir in South India and role of bacteriophage treatment to curtail drug-resistant bacterial pollution in water

Skariyachan¹,

Deshpande

Joshi

et al. 2021

Environmental Technology & Innovation

View full text Add to dashboard Cite

A simple high-throughput headspace gas chromatographic method for the determination of dissolved oxygen in aqueous samples

Cited by 3 publications

References 26 publications

Headspace Gas Chromatographic Method for Carbonate Content Determination in Layered Double Hydroxides

Headspace Gas Chromatographic Method for Carbonate Content Determination in Layered Double Hydroxides

Ratiometric Optical Fiber Dissolved Oxygen Sensor Based on Fluorescence Quenching Principle

Physicochemical and microbial pollution of a reservoir in South India and role of bacteriophage treatment to curtail drug-resistant bacterial pollution in water

Contact Info

Product

Resources

About