Solid-phase spectrophotometric iodometric determination of nitrite and selenium(IV) using a polymethacrylate matrix

Гавриленко, Н. А.; Saranchina, N. V.; Fedan, D. A.; Гавриленко, М. А.

doi:10.1134/s1061934817030054

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…In neutral or alkaline soil, selenium exists as selenate (SeO4 2− ), which has weaker adsorb ability in a clay soil [37]. In acidic soil, selenium mainly exists in the form of selenite (SeO3 2− ), which is more readily immobilized by absorption to soil iron and aluminum oxides [35,38]. The soil pH in the tea plantation ranged between 5.58 and 6.8, and may be the primary reason that the soil ASeR was relatively low.…”

Section: Availability and Factors Influencing Soil Selenium In Tea Pl...mentioning

confidence: 99%

Uptake and Transport of Selenium in a Soil–Tea Plant–Tea Infusion System: A Study of Typical Tea Plantations in a Selenium-Rich Area of China

Wu,

Zhang,

et al. 2024

Forests

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Selenium is an important indicator for the evaluation of tea quality. However, the relationship between selenium uptake by tea plants (Camellia sinensis) and soil properties, as well as selenium transport and distribution in a tea plantation soil–tea plant–tea infusion production system, remain unclear. In this study, 12 tea plantations situated in a typical selenium-rich area of China were selected, and the characteristics and crucial factors influencing the uptake and transport of selenium were analyzed using a plantation soil–tea plant–tea infusion production system. The soil total selenium content ranged from 1.12 to 6.67 mg kg−1, with an average of 2.57 mg kg−1. The average available selenium content was 53.56 µg kg−1, and the activation rate of soil selenium was 2.27%. Soil-available selenium was significantly positively correlated with total selenium, available potassium, and soil organic matter contents, and was significantly negatively correlated with soil pH. The selenium content in old leaves ranged from 0.29 to 2.73 mg kg−1, which met the standard for selenium-rich tea, whereas only 33% of young leaves met this standard. The selenium enrichment factor was highest in the fibrous root and lowest in the young leaves. The average selenium transport factors from fibrous roots to main roots, from main roots to main stems, from main stems to lateral stems, from lateral stems to young leaves, and from lateral stems to old leaves were 0.53, 0.92, 0.67, 0.97, and 2.30, respectively. The selenium concentration of tea infusion ranged from 1.88 to 12.49 μg L−1, and the average selenium dissolution rate was 22.62% after one brewing. This study identified critical factors that influence soil-selenium availability. The selenium content in tea plant organs is indicated to be strongly associated with the selenium content in the main roots.

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Section: Availability and Factors Influencing Soil Selenium In Tea Pl...mentioning

confidence: 99%

Uptake and Transport of Selenium in a Soil–Tea Plant–Tea Infusion System: A Study of Typical Tea Plantations in a Selenium-Rich Area of China

Wu,

Zhang,

et al. 2024

Forests

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“…With an increase in sample volume, EFS is more sensitive than Solution Molecular Absorption Spectrophotometry. (Gavrilenko, 2017)…”

Section: Introductionmentioning

confidence: 99%

Design of Methodologies for the Determination of Selenium and Mercury in Samples of Environmental Interest by Solid Phase Spectrophotometry

2023

JPTCP

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Selenium is a micronutrient with biological, antioxidant, and catalytic properties. Mercury's potential for volatilization and methylation makes its environmental behaviour both interesting and concerning. Because organic compounds can bioaccumulate in the food chain, they are the most toxic. These analytes are extremely rare in nature. It is critical to have an analytical method that combines a speciespreserving sample treatment with a system that allows for detection at low concentration levels. There are effective methods and techniques for detecting these species, but they require complex instrumentation and installations, making them impractical for use outside of the lab. Solid phase spectrophotometry is up-front and sensitive method for determining these elements. Overall, the goal of this research was to develop an analytical technique, such as solid phase spectrophotometry, that can measure selenium and mercury in environmental samples in a reliable and safe manner. The technique is to fix a coloured analyte-containing species to a solid support with specific properties. After the coloured complex has been fixed, spectral measurements are taken to quantify the analyte. Organic and inorganic analytes have been measured due to the versatility of these methods. The parameters for determining selenium in foliar samples and mercury in water samples are proposed and standardised using solid phase spectrophotometry. The results of this method are validated to ensure accuracy. The precision, linear range, detection limit, and quantification limit all demonstrate dependability. 1-100 mg/L linear range, the detection limit was 1.92 mg/L, while the quantification limit was 6.41 mg/L. The method's repeatability and reproducibility tests revealed a low degree of dispersion.

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Reversible pH-sensitive element based on bromocresol purple immobilized into the polymethacrylate matrix

Гавриленко

Saranchina

Sukhanov

et al. 2018

Mendeleev Communications

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Solid-phase spectrophotometric iodometric determination of nitrite and selenium(IV) using a polymethacrylate matrix

Cited by 4 publications

References 7 publications

Uptake and Transport of Selenium in a Soil–Tea Plant–Tea Infusion System: A Study of Typical Tea Plantations in a Selenium-Rich Area of China

Uptake and Transport of Selenium in a Soil–Tea Plant–Tea Infusion System: A Study of Typical Tea Plantations in a Selenium-Rich Area of China

Design of Methodologies for the Determination of Selenium and Mercury in Samples of Environmental Interest by Solid Phase Spectrophotometry

Reversible pH-sensitive element based on bromocresol purple immobilized into the polymethacrylate matrix

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