Combined liquid phase microextraction and fiber-optics-based cuvetteless micro-spectrophotometry for sensitive determination of ammonia in water and food samples by the indophenol reaction

Jain, Archana; Soni, Soumitra; Verma, Krishna K.

doi:10.1016/j.foodchem.2020.128156

Cited by 23 publications

(8 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results are summarized in Table 2 , where an excellent recovery (96.0 ± 2.7–101.6 ± 3.1%) of the NH 4 + added was achieved, supporting the analytical utility of the established sensing probe method for the detection of NH 4 + in various water samples. The probe was further validated by measuring the concentration of NH 4 + in spiked tap and sea water samples by the established probe and the official micro-spectrophotometry [ 15 ] and the obtained results are summarized in Table 3 . A good agreement in terms of accuracy, precision and average recovery was achieved by the established probe and the official method [ 15 ].…”

Section: Resultsmentioning

confidence: 99%

“…NH 4 + is normally derivatized with o -phthalaldehyde (OPA) in HPLC to give an intensely fluorescent azaindole, whereas in GC mass spectrometry methods, an alkyl chloroformate such as butyl chloroformate is used to convert NH 4 + ions to higher molecular mass derivatives [ 10 , 11 , 12 ]. Other optical detection methods such as spectrophotometry [ 5 , 14 , 15 , 16 ], fluorescence-based emission [ 17 , 18 ] and colorimetry [ 19 ] have been reported for the detection of NH 4 + in environmental water samples. However, most of these techniques suffer from many drawbacks such as expensive equipment and elaborated sample pre-treatment; hence, it is of great importance to develop an efficient and cost-effective method for the detection of NH 3 /NH 4 + [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development and Characterization of a Sol–Gel-Functionalized Glass Carbon Electrode Probe for Sensing Ultra-Trace Amounts of NH3 and NH4+ in Water

Alwael,

Oubaha,

El-Shahawi

2024

Gels

View full text Add to dashboard Cite

This study centers on the development and characterization of an innovative electrochemical sensing probe composed of a sensing mesoporous functional sol–gel coating integrated onto a glassy carbon electrode (sol–gel/GCE) for the detection of NH3 and/or NH4+ in water. The main interest for integrating a functional sol–gel coating onto a GCE is to increase the selective and sensing properties of the GCE probe towards NH3 and/or NH4+ ions. The structure and surface morphology of the newly developed sol–gel/GCE probe were characterized employing scanning electron microscopy (SEM), atomic force microscopy (AFM), dynamic light scattering (DLS), and Fourier-transform infrared (FTIR), while the electrochemical sensing properties were evaluated by Berthelot’s reaction, cyclic voltammetry (CV), and adsorptive square wave–anodic striping voltammetry (Ads SW–ASV). It is shown that the newly developed sol–gel coating is homogeneously deposited on the GCE with a sub-micron and uniform thickness close to 630 nm and a surface roughness of 25 nm. The sensing testing of the sol–gel/GCE probe showed limits of detection and limits of quantitation of 1.7 and 5.56 nM of NH4+, respectively, as well as a probe sensitivity of 5.74 × 10−1 μA/μM cm−2. The developed probe was fruitfully validated for the selective detection of NH3/NH4+ in fresh and sea water samples. Computed Student texp (0.45–1.25) and Fexp (1.69–1.78) (n = 5) tests were less than the theoretical ttab (2.78) and Ftab (6.39) at 95% probability.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development and Characterization of a Sol–Gel-Functionalized Glass Carbon Electrode Probe for Sensing Ultra-Trace Amounts of NH3 and NH4+ in Water

Alwael,

Oubaha,

El-Shahawi

2024

Gels

View full text Add to dashboard Cite

show abstract

“…µQuEChERS was employed in the extraction of several analytes from foods, ranging from pesticide residues in wine [137] and PAHs in coffee and tea [138] to polyphenols in baby food [139] and pyrrolizidine alkaloids in oregano [66]. The application of SDME was proved to allow the determination of unfavorable compounds and elements in foods, such as drug metabolites [140], acrylamide [141], ammonia [142], ethyl carbamate [143], formaldehyde [144], tartrazine [145], and Cu(II) [146]. Similarly to SDME, SFOME can be used for the detection of trace metals [147], as well as of β-lactam antibiotic residues [148] and organochlorine pesticides [149].…”

Section: Food Samplesmentioning

confidence: 99%

Green Extraction Techniques as Advanced Sample Preparation Approaches in Biological, Food, and Environmental Matrices: A Review

et al. 2022

View full text Add to dashboard Cite

Green extraction techniques (GreETs) emerged in the last decade as greener and sustainable alternatives to classical sample preparation procedures aiming to improve the selectivity and sensitivity of analytical methods, simultaneously reducing the deleterious side effects of classical extraction techniques (CETs) for both the operator and the environment. The implementation of improved processes that overcome the main constraints of classical methods in terms of efficiency and ability to minimize or eliminate the use and generation of harmful substances will promote more efficient use of energy and resources in close association with the principles supporting the concept of green chemistry. The current review aims to update the state of the art of some cutting-edge GreETs developed and implemented in recent years focusing on the improvement of the main analytical features, practical aspects, and relevant applications in the biological, food, and environmental fields. Approaches to improve and accelerate the extraction efficiency and to lower solvent consumption, including sorbent-based techniques, such as solid-phase microextraction (SPME) and fabric-phase sorbent extraction (FPSE), and solvent-based techniques (μQuEChERS; micro quick, easy, cheap, effective, rugged, and safe), ultrasound-assisted extraction (UAE), and microwave-assisted extraction (MAE), in addition to supercritical fluid extraction (SFE) and pressurized solvent extraction (PSE), are highlighted.

show abstract

“…Pipeline corrosion and other unfavourable effects might be avoided with the help of sulphide treatment, which was necessary for safety reasons [8]. At each stage of a well's lifecycle, SRB degradation poses a hazard that must be identified and counteracted [9]. According to the United States Geological Survey (USGS), one oil barrel requires 1,850 water gallons to retrieve and refine over the course of its lifetime.…”

Section: Introductionmentioning

confidence: 99%

Impact of Bio-Competitive Exclusion on Nitrate-Reducing Bacteria in Oil Reservoir Water Treatment

2023

Global NEST: The International Journal

View full text Add to dashboard Cite

<p>In the presence of nitrogen oxides, nitrate-reducing bacteria (NRB) may use nitrate as an electron acceptor, reduce nitrate to nitrite, and finally convert nitrite to nitrogen or ammonium (NO and N2O). Studies have shown that BCX (Bio-Competitive Exclusion) is a viable , ecologically benign, and low-cost technique for regulating NRB in its first phases of study and application. More precisely, Pseudomonas sp. to isolate nitrate-reducing bacteria from oil-field wastewater using 16S rDNA sequencing and selection (NRB). Including NO3 and NO2 as bio-activators has helped researchers get a deeper understanding of the processes that govern NRB activation. The potential for molybdate and NRB to inhibit Sulfate-Reducing Bacteria (SRB) was also investigated. The results showed that NO2 was more effective than NO3. The effect was greatest at a 1:4 ratio of NO3 to NO2. NRB activation synergized with low molybdic acid solution concentrations (5%). Static corrosion model experiments demonstrated the importance of SRB in the corroding process. Biological inhibitors were shown to have the lowest corrosion rates, proving their effectiveness. Scanning electron microscopy was used to examine the corroded steel sheet's surface morphology. In addition, there was almost no surface corrosion or pitting on the steel sheet.</p>

show abstract

Combined liquid phase microextraction and fiber-optics-based cuvetteless micro-spectrophotometry for sensitive determination of ammonia in water and food samples by the indophenol reaction

Cited by 23 publications

References 44 publications

Development and Characterization of a Sol–Gel-Functionalized Glass Carbon Electrode Probe for Sensing Ultra-Trace Amounts of NH3 and NH4+ in Water

Development and Characterization of a Sol–Gel-Functionalized Glass Carbon Electrode Probe for Sensing Ultra-Trace Amounts of NH3 and NH4+ in Water

Green Extraction Techniques as Advanced Sample Preparation Approaches in Biological, Food, and Environmental Matrices: A Review

Impact of Bio-Competitive Exclusion on Nitrate-Reducing Bacteria in Oil Reservoir Water Treatment

Contact Info

Product

Resources

About