Spectrophotometric determination of nitrite in waters

Flamerz, S.; Bashir, Wadala A.

doi:10.1039/an9810600243

Cited by 28 publications

(4 citation statements)

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“…The molar absorptivity is 4.6 ϫ 10 4 liters mol Ϫ1 cm Ϫ1 (while the Sandell sensitivity is 0.0010 g cm Ϫ2 for an absorbance of 0.001) for determining nitrite. This is greater than the values obtained using Flamerz and Bashir's two methods (4,5), which are E max ϭ 1.47 ϫ 10 4 and 3.05 ϫ 10 4 , respectively, and Bajic and Jaselskis' method (6), E max ϭ 4.21 ϫ 10 4 , and the value about equals the best literature value (7) (6 -12): NO 2 Ϫ alone is determined, and sequential determination of the two ions can be performed without eliminating mutual interference or performing separation beforehand.…”

Section: Resultscontrasting

confidence: 74%

Sequential Spectrophotometric Determination of Microgram Amounts of Nitrate and Nitrite in Mixtures

Fang

Xie

Fang

1998

Microchemical Journal

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Section: Resultscontrasting

confidence: 74%

Sequential Spectrophotometric Determination of Microgram Amounts of Nitrate and Nitrite in Mixtures

Fang

Xie

Fang

1998

Microchemical Journal

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“…It was then utilized to determine the following chemical components: -Nitrate nitrogen (ppm) was determined spectrophotometrically at 410 nm according to the procedure of Cataldo et al (1975). -Nitrite nitrogen (ppm) was determined spectrophotometrically at 520 nm according to the procedure adopted by Flamerz and Bashir (1981).…”

Section: Chemical Analysismentioning

confidence: 99%

MORPHO-PHYSIOLOGICAL AND BIOCHEMICAL RESPONSES OF H2S – POLLUTED LETTUCE (Lactuca Sativa L.) PLANTS TO ASCORBIC ACID

Selim

2024

Menoufia Journal of Plant Production

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Pot experiments were conducted in a greenhouse with the aim to study the role of antioxidant ascorbic acid under two levels (0 and 100 ppm) in minimizing and/or overcoming the phytotoxic effects of H 2 S (0, 50 and 100 ppm) on growth characters, some physiological and biochemical aspects; and yield quantity and quality parameters of lettuce plants. Vegetative growth parameters of H 2 Spolluted lettuce plants were significantly reduced with increasing the H 2 S level. The phytotoxic effect of H 2 S at the high level was more pronounced and greater in head length (-31%), stem length (-34%), leaf area (-42%), fresh whole plant (-35%) and dry whole plants (-34%) matters of lettuce plant than other growth characters. Treating the H 2 S-polluted lettuce plants with ascorbic acid not only counteracted the harmful effect on the above-mentioned parameters, but also induced a greatly increase in them, head length (40%), stem length (104%), leaf area (82%), fresh whole plant (148%) and dry whole plant (96%) matters compared with the untreated plants. Leaf water deficit (LWD), osmotic pressure and membrane integrity (MI) were increased, whereas total water content (TWC), relative water content (RWC), transpiration rate, and the administration of H 2 S reduced the succulence of the leaves. Using ascorbic acid led to regulate and improve the plant water status by increasing RWC (66%) and osmotic pressure (16%), and decreasing LWD (40%), and MI (28%). All H 2 S levels had a deleterious effect on leaf photosynthetic pigments; chlorophyll a, b and total chlorophylls, carotenoids, total photosynthesis as well as chlorophyll stability index (CSI). Application of ascorbic acid overcame the inhibitory effect of H 2 S and enhanced the biosynthesis and concentration of photosynthetic pigments; chl. a (170%), chl. b (303%), total chlorophyll (186%) as well as carotenoids (64%). Exposure of lettuce plants to H 2 S pollutant significantly reduced the head yield, more at 100 ppm (-50%) than that at 50 ppm (-33%). The values of chemical components, i.e., vitamin C, total protein, total soluble sugars (SS), total amino acids and N, P, K minerals contents in head lettuce leaves significantly decreased with increasing the H 2 S level. While the Sulphur (S) contents, soluble phenols, NO 3 -N and NO 2 -N in lettuce leaves were increased as H 2 S rates increased. Adding ascorbic acid to the H 2 S-polluted lettuce plants not only led to overcome the deleterious effect of intolerable H 2 S levels (50 and 100 ppm) on most above-mentioned characters, but also increased the yield (150 and 169%) and improved the qualitative characters of head lettuce leaves.

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“…4 Numerous spectrophotometric methods based on the Griess-Ilosvay reaction have been proposed for nitrite determination. [5][6][7][8][9] This reaction involves the diazotization of the nitrite with an aromatic amine in acidic medium to form a diazonium salt, which by an aromatic electrophilic substitution (coupling reaction) with a phenolic compound or an aromatic amine leads to the formation of an azo dye. Shinn's proposal 10 to use sulfanilamide and N-(1-naphthyl)ethylenediamine dihydrochloride as diazotization and coupling reaction reagents, respectively, has been the basis of many FIA spectrophotometric methods.…”

Section: Introductionmentioning

confidence: 99%

Sequential injection spectrophotometric analysis of nitrite in natural waters using an on-line solid-phase extraction and preconcentration method

Miró

Cladera

Estela

et al. 2000

Analyst

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Spectrophotometric determination of nitrite in waters

Cited by 28 publications

References 0 publications

Sequential Spectrophotometric Determination of Microgram Amounts of Nitrate and Nitrite in Mixtures

Sequential Spectrophotometric Determination of Microgram Amounts of Nitrate and Nitrite in Mixtures

MORPHO-PHYSIOLOGICAL AND BIOCHEMICAL RESPONSES OF H2S – POLLUTED LETTUCE (Lactuca Sativa L.) PLANTS TO ASCORBIC ACID

Sequential injection spectrophotometric analysis of nitrite in natural waters using an on-line solid-phase extraction and preconcentration method

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