On-line flow injection monitoring of ammonia in industrial liquid effluents

Andrew, Kevin N.; Worsfold, Paul J.; Comber, Mike

doi:10.1016/0003-2670(95)00269-6

Cited by 46 publications

(25 citation statements)

References 19 publications

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“…Using these data, the FI procedure was univariately optimized with respect to the bromothymol blue concentration and pH, sodium hydroxide concentration, flow rate, and sample loop volume to give a linear response over the range 0-300 mg L ‫1מ‬ NH 3 -N. The optimum conditions are summarized in Table 2 and are in good agreement with those reported by Andrew et al [9].…”

Section: Laboratory Optimization Of the Fi Proceduressupporting

confidence: 73%

“…The version of the laboratory-based indophenol blue method used for the validation of monitor performance is described elsewhere [9].…”

Section: Experimental Reagentsmentioning

confidence: 99%

“…However, such devices can suffer from biological fouling and physical scouring of the sensing surfaces, chemical interferences, and instrument drift. An alternative approach that has been successfully used to analyze a wide range of analytes, e.g., nitrate [5,6], orthophosphate [7,8], ammonia [9,10], aluminum [11], and glucose [12], in automated monitoring systems is flow injection (FI) in conjunction with solid-state spectrophotometric detection. FI is characterized by its simplicity, low cost, high sampling rate (60-100 h ‫1מ‬ ), low reagent consumption (1-3 mL min ‫1מ‬ ), small sample volumes (10-500 lL), and good reproducibility.…”

Section: Introductionmentioning

confidence: 99%

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In situ flow-injection monitoring of ammonia in landfill leachate

Bloxham

Depledge

Worsfold

1997

Laboratory Robotics and Automation

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Section: Laboratory Optimization Of the Fi Proceduressupporting

confidence: 73%

“…The version of the laboratory-based indophenol blue method used for the validation of monitor performance is described elsewhere [9].…”

Section: Experimental Reagentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In situ flow-injection monitoring of ammonia in landfill leachate

Bloxham

Depledge

Worsfold

1997

Laboratory Robotics and Automation

Self Cite

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“…According to the Griess-Ilosvay reaction, NO 2 2 is diazotized with sulfanilamide and coupled with N-(1-naphthyl)-ethylenediamine dihydrochloride to form a purple-red azo dye monitored at 538 nm (Oliveira et al, 2007). NH 4 + was measured according to Andrew et al (1995).…”

mentioning

confidence: 99%

The Mitochondrial Folylpolyglutamate Synthetase Gene Is Required for Nitrogen Utilization during Early Seedling Development in Arabidopsis

et al. 2012

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Investigations into the biochemical processes and regulatory mechanisms of nitrogen (N) utilization can aid in understanding how N is used efficiently in plants. This report describes a deficiency in N utilization in an Arabidopsis (Arabidopsis thaliana) transfer DNA insertion mutant of the mitochondrial folylpolyglutamate synthetase gene DFC, which catalyzes the conjugation of glutamate residues to the tetrahydrofolate during folate synthesis. The mutant seedlings displayed several metabolic changes that are typical of plant responses to low-N stress, including increased levels of starch and anthocyanin synthesis as well as decreased levels of soluble protein and free amino acid, as compared with those in wild-type seedlings when external N was sufficient. More striking changes were observed when dfc seedlings were grown under N-limited conditions, including shorter primary roots, fewer lateral roots, higher levels of glycine and carbon-N ratios, and lower N content than those in wild-type seedlings. Gene expression studies in mutant seedlings revealed altered transcript levels of several genes involved in folate biosynthesis and N metabolism. The biochemical and metabolic changes also suggested that N assimilation is drastically perturbed due to a loss of DFC function. The observation that elevated CO 2 partly rescued the dfc phenotypes suggests that the alterations in N metabolism in dfc may be mainly due to a defect in photorespiration. These results indicate that DFC is required for N utilization in Arabidopsis and provide new insight into a potential interaction between folate and N metabolism. Nitrogen (N) is an essential macronutrient for plants and a major limiting factor for crop growth (Diaz et al., 2006). Investigations into the biochemical processes and regulatory mechanisms of N utilization can aid in understanding how N is used efficiently in plants. Low inorganic N results in numerous perturbations in plant metabolism, such as decreases in nitrate (NO 3 2

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“…Several ammonia sensors have been reported, majority of them are based on gas diffusion cell approach. In these systems ammonia gas diffuses through a gas permeable hydrophobic membrane (mainly PTFE-polytetrafluoro ethylene) into a recipient solution where ammonia can be detected by means of a simple and inexpensive detection technique like colorimetric, pH indicator [4,5], a NH 4 + ion selective electrode [6] or a pH sensor [7,8]. The oxidation of ammonia in alkaline solution by an electrochemical method has been the subject of continuous investigations [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Anthraquinone functionalized carbon composite electrode: Application to ammonia sensing

Ramakrishnappa¹,

Malingappa²,

Nagaraju³

2011

Sensors and Actuators B: Chemical

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a b s t r a c tA simple strategy has been used to covalently modify the glassy carbon spheres with anthraquinone moieties through the diazonium salt reduction. The derivatized glassy carbon spheres were used to modify the basal plane pyrolytic graphite electrode by immobilizing them on its surface and examining its electrochemical behaviour. The composite electrode has been used to detect trace level ammonia in the concentration range 5 × 10 −8 to 3 × 10 −5 M and it was successfully applied to detect low levels of ammonia present in natural samples like urine and soil.

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On-line flow injection monitoring of ammonia in industrial liquid effluents

Cited by 46 publications

References 19 publications

In situ flow-injection monitoring of ammonia in landfill leachate

In situ flow-injection monitoring of ammonia in landfill leachate

The Mitochondrial Folylpolyglutamate Synthetase Gene Is Required for Nitrogen Utilization during Early Seedling Development in Arabidopsis

Anthraquinone functionalized carbon composite electrode: Application to ammonia sensing

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