A Comparison of Mineral Extraction Techniques of Citrus Juices as Analyzed by Inductively Coupled Plasma Atomic Emission Spectrometry

Rezaaiyan, Ruhi; Nikdel, S.

doi:10.1111/j.1365-2621.1990.tb03936.x

Cited by 9 publications

(5 citation statements)

References 6 publications

(2 reference statements)

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“…Mineral Analysis by ICP-Atomic Emission Spectrometer. Inductively coupled plasma (ICP of Spectro Analytical Instruments) atomic emission spectrometry (Rezaaiyan and Nikdel, 1990) was used to determine the mineral content of the gum-coating solution after dialysis and the different parts of the mushrooms including the cap, stipe, gills, and outer layer at a thickness of 1 mm. The outer layer of the cap surface and the cap were also examined after the coating film was removed.…”

Section: Methodsmentioning

confidence: 99%

Relationships between Hydrocolloid Coating and Mushroom Structure

Hershko

Nussinovitch

1998

J. Agric. Food Chem.

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Agaricus bisporus edible mushrooms were coated with different gum-based coatings, including alginate and alginate−ergosterol, with or without emulsifier. The structures of the different parts of the mushroom tissue were studied by SEM. Various penetration modes of coating and cross-linking solutions into the tissue were examined. The techniques of ICP and X-ray analysis were used to quantify the presence and depth of penetration of minerals into the mushroom tissue before and after coating. Critical surface tension of the “solid” upper surface of the mushroom was estimated using the Zisman plot. The alginate-based coating solutions were tested for their surface tension and contact angles on the mushroom tissue. Reduction in the surface tension and the contact angles of the coating solutions lead to better wettability of the surface. Coated mushrooms were found to have a better appearance, a better color, and an advantage in weight in comparison with the uncoated ones. The alginate−ergosterol−Tween coating combination was most suitable for maintaining the size and shape of the coated mushroom. Keywords: Coating; hydrocolloid; mushroom; penetration; surface tension

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Section: Methodsmentioning

confidence: 99%

Relationships between Hydrocolloid Coating and Mushroom Structure

Hershko

Nussinovitch

1998

J. Agric. Food Chem.

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“…Freeze-dried sample (2 g) was incinerated in muffle furnace for 24 h at 550 °C, and white ashes were gravimetrically quantified (Horwitz and Latimer, 2005). The residue of incineration was recovered by the method of Rezaaiyan and Nikdel (1990).…”

Section: Ash Content and Mineral Compositionmentioning

confidence: 99%

Nutrient composition of Algerian strawberry-tree fruits (Arbutus unedo L.)

Boussalah¹,

Boussalah²,

Cebadera-Miranda³

et al. 2018

Fruits

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Introduction. Arbutus unedo L. (strawberry-tree fruit) is indigenous plant in North Africa with few published works about the composition of its fruits. For their valorization, morphological and chemical characterizations were carried out for two harvesting seasons of four different areas of Algeria. Materials and methods. Wild strawberry-tree fruits were collected in four different sites located in Tell Atlas, and two different seasons. Fruit size and shape, pH, titratable acidity, moisture, total available carbohydrate (TAC), soluble sugars, dietary fiber, protein, lipid, ash, fatty acids and mineral composition (K, Na, Ca, Mg, Fe, Cu, Mn, Zn, Ni and Cd) were determined. Results and discussion. Fruit contents (in g kg −1) varied between 637.3 ± 33.8 to 741.3 ±12.0, 126.8 ± 11.1 to 189.3 ± 4.1, 22.6 ± 2.2 to 35.5 ± 2.1, 5.1 ± 0.3 to 8.8 ± 0.5 for moisture, TAC, protein and lipid, respectively. For iron, fruit weight and polyunsaturated fatty acids (PUFA), the contents varied between 7.01 ± 0.15 to 17.24 ± 0.74 mg kg −1 of fruit, 4.91 ± 1.58 to 6.76 ± 2.04 g and 56.34 ± 1.37 to 68.18 ± 0.14% of lipid, respectively. Conclusion. This study provides original data about the morphological and chemical composition of strawberry-tree fruits from Algeria. The results show that the fruits can be essentially a potential source of dietary fiber, PUFA and iron.

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“…18 The usual methods applicable for orange juice sample preparation involve the organic matter destruction. Dry ashing in a muffle furnace, 3,5,7,8,12,13 wet digestion procedure using a hot plate, 4,10,14 or microwave-assisted oven 9,12,13,[15][16][17] have been used as orange juice sample preparation for elemental analysis. For some elements determination, such as Al, a simple filtration has been proposed.…”

Section: Etaas Icp-oes and Icp-ms Whereas Simultaneous Icp-mentioning

confidence: 99%

On-line digestion in a focused microwave-assisted oven for elements determination in orange juice by inductively coupled plasma optical emission spectrometry

Fili¹,

Oliveira²,

Oliveira³

2003

J. Braz. Chem. Soc.

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Um sistema de fluxo acoplado a um forno de microondas focalizadas foi utilizado para digestão em linha de amostras de suco de laranja para a determinação de Ca, Cu, Fe, K, Mg, Mn, Na, P e Zn por espectrometria de emissão ótica com plasma indutivamente acoplado. Uma bobina de reação de PTFE (4,0 m de comprimento e 1,6 mm de diâmetro interno) foi posicionada no interior da cavidade de vidro do forno de microondas focalizadas. Alíquotas de 500 µL de amostra e de 1000 µL de reagente (80% v/v HNO 3 ) foram misturadas em uma confluência e conduzidas para a bobina de reação utilizando ar como carregador. O desvio padrão relativo para cinco determinações da mesma amostra usando o método proposto foi inferior a 5,0%. Boas recuperações variando de 91 a 111% foram obtidas para adições de quantidades conhecidas dos elementos de interesse. Os resultados obtidos, utilizando o sistema de digestão proposto, foram concordantes a um nível de confiança de 95% com aqueles obtidos por digestão total. Com este método de digestão foi possível processar 12 amostras h -1 , minimizando contaminações, consumo de amostra e reagentes e gerando pequena quantidade de resíduos.A flow injection system coupled to focused microwave-assisted oven was used for on-line orange juice sample digestion for determination of Ca, Cu, Fe, K, Mg, Mn, Na, P, and Zn by inductively coupled plasma optical emission spectrometry. The reactor coil was a PTFE tube (4.0 m long and 1.6 mm i.d.) positioned into the commercial glass tube of the focused microwave oven. Aliquots of 500 µL of sample and 1000 µL of reagent (80% v/v HNO 3 ) were mixed in a confluence and carried out to the reactor coil by air carrier. The relative standard deviation for five replicates of sample was lower than 5.0%. Good recoveries varying from 91 to 111% were obtained for added concentrations of the interest elements. The results obtained using the proposed digestion system are in agreement with those obtained for total digestion at the 95% confidence level. With this on-line digestion system was possible to carry out 12 samples h -1 , minimizing contamination, saving consumption of samples and reagent and low residue generation.

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A Comparison of Mineral Extraction Techniques of Citrus Juices as Analyzed by Inductively Coupled Plasma Atomic Emission Spectrometry

Cited by 9 publications

References 6 publications

Relationships between Hydrocolloid Coating and Mushroom Structure

Relationships between Hydrocolloid Coating and Mushroom Structure

Nutrient composition of Algerian strawberry-tree fruits (Arbutus unedo L.)

On-line digestion in a focused microwave-assisted oven for elements determination in orange juice by inductively coupled plasma optical emission spectrometry

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