Fifty years of atomic absorption spectrometry

Львов, Б. В.

doi:10.1007/s10809-005-0103-0

Cited by 43 publications

(9 citation statements)

References 32 publications

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“…The sample bottles were then labeled accordingly. The samples were allowed to stand for about 90 min, (to allow for clotting and retraction), 20 after which it was spun with a centrifuge at 3000 revolutions per min for 10 min. Subsequently, the serum, (usually about 2.0 ml), was separated with a bulb pipette into trace element-free plain tubes.…”

Section: Aterials and M Ethodsmentioning

confidence: 99%

“…The machine operates at a wavelength range of 190–900 nm with typical sensitivity in the parts per million range. 20 The analysis was done using the principle of absorption spectrophotometry which assesses the concentration of an analyte in a sample. 21 22 The samples for serum zinc analysis were batched into groups of 20 and stored in a refrigerator (at −20°C) for later analysis of serum zinc.…”

Section: Aterials and M Ethodsmentioning

confidence: 99%

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Serum zinc levels in apparently healthy children in Nigeria: Are they acceptable

2020

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Introduction: Despite the importance of zinc in the human body, there is paucity of data on the zinc status of Nigerian children. The aim of this study was to determine the serum zinc levels of children attending the pediatric outpatient clinic of a tertiary hospital in South East Nigeria and to assess their need for routine zinc supplementation. Materials and Methods: One hundred children aged 5–60 months were recruited consecutively from the pediatric outpatient clinic. Their socioeconomic class (SEC) was assessed using the tool developed by Oyedeji. Physical examination was carried out to exclude malnutrition and/or liver disease. Samples were collected in the morning from nonfasting subjects and were analyzed using atomic absorption spectrophotometer. Serum zinc deficiency was defined as zinc level <80 μg/dl. Results: The overall median (range) serum zinc level was 83.3ug/dl (60–105 μg/dl) while the median (mean rank) serum zinc levels among male and female subjects were 83.4 μg/dl and 84.2ug/dl, respectively ( U = 1071.00; P = 0.228). A total of 26 (26%) apparently healthy children had low serum zinc levels. There was no association between gender and serum zinc levels (χ 2 = 2.163; P = 0.141). A significant positive but weak relationship was found between SEC and zinc levels ( r = 0.208, P = 0.038) but not between serum zinc levels and age of the children ( r = 0.185, P = 0.065). Conclusion: A significant proportion of Under-5s could have low serum zinc levels. Routine zinc supplementation may be necessary among this age group in Nigeria.

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Section: Aterials and M Ethodsmentioning

confidence: 99%

Section: Aterials and M Ethodsmentioning

confidence: 99%

Serum zinc levels in apparently healthy children in Nigeria: Are they acceptable

2020

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“…The only reason to measure Cu levels in each treatment plot soil was to show that they are, indeed, quite high, and that some species were able to survive and develop biomass at good rates in toxic levels of soil Cu. The total Cu concentration in soils was measured by atomic absorption spectrometry (Bersier, Howell, & Bruntlet, 1994;L'vov, 2005).…”

Section: Cu Concentration Of Soilsmentioning

confidence: 99%

“…La única razón para medir los niveles de Cu en cada suelo de la parcela del tratamiento fue para demostrar que son bastante altos y que, aun con niveles tóxicos, algunas especies fueron capaces de sobrevivir y desarrollar la biomasa con buenas tasas. La concentración total de Cu en suelos se midió por espectrometría de absorción atómica (Bersier, Howell, & Bruntlet, 1994;L'vov, 2005).…”

Section: Concentración De Cu En Los Suelosunclassified

Especies forestales para la recuperación de suelos contaminados con cobre debido a actividades mineras

Pizarro¹,

Flores²,

Tapia³

et al. 2015

Rev Cha Se Cie For y del Amb

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Mining is the most important economic activity in Chile; causing significant degradation of the environment in the arid regions. The Coquimbo Region has suffered serious soil and water pollution because of heavy metals from mining, particularly copper. Implementation of measures that help to minimize the environmental impact of mining tailings requires knowledge about the adaptability of vegetal species to degraded soil conditions. Our objective was to determine and compare the phytostabilization abilities of native and exotic shrub species in areas extremely damaged by mining activities in the Coquimbo Region. The survival growth, and canopy development rates of 20 species were evaluated by two experiments. The Cu quantity in stems and leaves and at three soil depths was measured. Our results indicated that Acacia saligna is the best species in accumulating heavy metals (average of 34.8 ppm in leaves and 12.3 ppm in stems, both for non-fertilized soils), while demonstrating average survival rates over 80 %. This study concludes that A. saligna is the best species for phytostabilization activities in mine tailings of the Coquimbo Region. ResumenL a minería es la actividad económica más importante de Chile, la cual causa degradación significativa en las regiones áridas. Los suelos de la Región de Coquimbo han sufrido contaminación metales pesados provenientes de la minería, particularmente cobre. La implementación de medidas, que ayuden a minimizar el impacto ambiental de los relaves mineros, requiere conocer la capacidad de adaptación de especies vegetales ante la degradación de suelos contaminados. El objetivo de este estudio fue determinar y comparar la capacidad de fitoestabilización de especies vegetales nativas y exóticas en áreas degradadas por la actividad minera en la Región de Coquimbo. Las tasas de supervivencia, crecimiento y desarrollo del dosel de 20 especies fueron evaluadas en dos ensayos experimentales. La concentración de Cu se evaluó en tallos y hojas de los árboles y en diferentes profundidades del suelo. Los resultados indicaron que Acacia saligna tiene la mejor capacidad de acumulación de metales pesados (34.8 ppm en hojas y 12.3 ppm en tallos, ambos en suelos sin fertilizar), con tasas de supervivencia mayores de 80 %. Se concluye que A. saligna es la mejor especie para actividades de fitoestabilización en relaves mineros de la Región de Coquimbo. Palabras clave:Fitorremediación, fitoestabilización, fitotoxicidad, relaves mineros, degradación de suelos, manejo y conservación de suelos.

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“…The soil and leave samples were digested in accordance with the procedure described by L'vov [24]. Specifically, a sample of 0.5 g of soil sample was digested with 5ml concentrated nitric acid at 100 C until brown fumes were observed, the concentrated hydrogen peroxide added to complete the digestion.…”

Section: Laboratory Proceduresmentioning

confidence: 99%

Use of Low Cost Soil Amendments Reduces Uptake of Cadmium and Lead by Tobacco (Nicotiana tabacum) Grown in Medially Polluted Soils

Nyambaka

Ngorwe

Murungi

2014

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The study explored the use of low cost soil amendments in reducing lead and cadmium uptake in tobacco. High levels of these metals in tobacco are of concern because of their toxicity and cumulative nature in tobacco consumers. Tobacco was planted in soils amended with cow manure and hydroxyapatite (HA), and non-amended sandy-loamy soil containing 60.57±3.74 µg/g lead and 33.95±0.49 µg/g cadmium in field and pot experiments. Tobacco leaves harvested after 75 days were dried, acid digested and their metal contents determined using atomic absorption spectroscopy (AAS). Cow manure reduced cadmium uptake by 67.20% and 71.75% in field and pot experiments while 1.5% HA reduced lead uptake by 39.69% in field experiments. Pot experiments had higher metals uptake than field experiments while fertilizer treatments recorded highest uptake. However, the levels were within WHO/FAO limits, indicating that amending medially polluted soils with cow manure and HA results in safe harvests of tobacco.

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Fifty years of atomic absorption spectrometry

Cited by 43 publications

References 32 publications

Serum zinc levels in apparently healthy children in Nigeria: Are they acceptable

Serum zinc levels in apparently healthy children in Nigeria: Are they acceptable

Especies forestales para la recuperación de suelos contaminados con cobre debido a actividades mineras

Use of Low Cost Soil Amendments Reduces Uptake of Cadmium and Lead by Tobacco (Nicotiana tabacum) Grown in Medially Polluted Soils

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