Iron, copper and zinc in white sugar from Serbian sugar beet refineries

Škrbić, Biljana; Gyura, Julianna

doi:10.1016/j.foodcont.2005.09.004

Cited by 14 publications

(3 citation statements)

References 5 publications

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“…sucrose, trehalose or hydroxyethyl starch) and ferrous ion concentration on DLPC degradation during lyophilization. In an attempt to mimic transition metal contaminants known to be present in pharmaceutical-grade sugars, we spiked ferrous ion into the DLPC samples at iron levels that are commonly found in pharmaceutical-grade sugars [26, 27]. Although the effect of transition metals, such as ferric and ferrous ions, on the oxidative degradation of lipids has been studied, a significant proportion of studies which examined iron catalyzed lipid peroxidation were focused on the stability of consumable foods and the progression of various diseases [28–30].…”

Section: Introductionmentioning

confidence: 99%

Lyophilization of a triply unsaturated phospholipid: Effects of trace metal contaminants

Payton¹,

Wempe²,

Betker³

et al. 2013

European Journal of Pharmaceutics and Biopharmaceutics

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As liquid liposomal formulations are prone to chemical degradation and aggregation, these formulations often require freeze drying (e.g. lyophilization) to achieve sufficient shelf-life. However, liposomal formulations may undergo oxidation during lyophilization and/or during prolonged storage. The goal of the current study was to characterize the degradation of 1, 2-dilinolenoyl-sn-glycero-3-phosphocholine (DLPC) during lyophilization, and to also probe the influence of metal contaminants in promoting the observed degradation. Aqueous sugar formulations containing DLPC (0.01 mg/ml) were lyophilized, and DLPC degradation was monitored using HPLC/UV and GC/MS methods. The effect of ferrous ion and sucrose concentration, as well as lyophilization stage promoting lipid degradation, was investigated. DLPC degradation increased with higher levels of ferrous ion. After lyophilization, 103.1% ± 1.1%, 66.9% ± 0.8%, and 28.7% ± 0.7% DLPC remained in the sucrose samples spiked with 0.0 ppm, 0.2 ppm and 1.0 ppm ferrous ion, respectively. Lipid degradation predominantly occurs during the freezing stage of lyophilization. Sugar concentration and buffer ionic strength also influence the extent of lipid degradation, and DLPC loss correlated with degradation product formation. We conclude that DLPC oxidation during the freezing stage of lyophilization dramatically compromises the stability of lipid-based formulations. In addition, we demonstrate that metal contaminants in sugars can become highly active when lyophilized in the presence of a reducing agent.

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Section: Introductionmentioning

confidence: 99%

Lyophilization of a triply unsaturated phospholipid: Effects of trace metal contaminants

Payton¹,

Wempe²,

Betker³

et al. 2013

European Journal of Pharmaceutics and Biopharmaceutics

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“…Quando presente, ele promove aumento de cor no açúcar uma vez que é constituinte fundamental da reação entre compostos fenólicos e oxigênio do ar. O amarelecimento compromete a qualidade do açúcar obtido (Simioni et al, 2006;Skrbic & Gyura 2007;Rein, 2012;Borges et al, 2012) e reduz a procura do cliente por este produto, sobretudo os que o utilizam como matéria-prima para fabricação de bebidas transparentes ou outros produtos de baixa coloração, de forma a garantir o "shelf-life" dos mesmos (Oliveira et al, 2007). Neste sentido deve-se destacar a eficácia dos extratos de folhas e sementes de moringa, que promoveram produtos com menor teor de ferro.…”

Section: Resultsunclassified

Reflexos da clarificação do caldo de cana com moringa sobre compostos inorgânicos do açúcar VHP

Costa

Masson

Freita

et al. 2015

Rev. bras. eng. agríc. ambient.

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R E S U M OObjetivou-se, neste trabalho, avaliar os reflexos da clarificação do caldo de cana utilizando extrato de folhas e sementes de moringa (Moringa oleifera Lamarck) como auxiliares de sedimentação sobre os teores dos compostos inorgânicos do caldo clarificado e do açúcar VHP (Very High Purity -Tipo Exportação) produzido. O delineamento experimental utilizado foi o fatorial 5 x 2 com quatro repetições; o primeiro fator correspondeu aos auxiliares de sedimentação: extrato de folhas e sementes de moringa, polieletrólito sintético e testemunha; já o segundo fator correspondeu a duas variedades de cana-de-açúcar: RB92579 e RB867515. O caldo extraído foi clarificado através de caleagem simples, concentrado até 60 o Brix e submetido ao processo de cozimento. No caldo original, clarificado e no açúcar produzido, foram quantificados os teores de fósforo, potássio, cálcio, sódio, magnésio, manganês e ferro além do teor de cinzas totais. Os empregos dos extratos de folhas e sementes de moringa se mostraram eficazes no tratamento do caldo destinado à produção de açúcar, por eliminar quantidades significativas de cálcio e ferro em comparação ao polieletrólito sintético. O extrato de folhas foi o melhor auxiliar de sedimentação,quando comparado aos demais.

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“…The content of these elements may be treated as an additional criterion of the purification and filtration process of beet juice and of the sugar crystallization process (Wojtczak and Krol, 2002). Considering the research studies dealing with elemental analysis of commercial beet sugar there are several published papers generally referring the analysis of heavy elements either essential and/or toxic ones (Leblebici and Volkan, 1998, Ronda et al, 2001, Wojtczak and Krol, 2002, Škrbić and Gyura, 2006, Škrbić and Gyura, 2007. The content of impurities is important also to be known for the sugar beet by-products such as molasses and dried sugar beet pulp (fibers) nowadays, because they are widely used as food supplements due to claimed health benefits.…”

Section: Introductionmentioning

confidence: 99%

Determination of Metal Contents in Sugar Beet (Beta vulgaris) and Its Products: Empirical and Chemometrical Approach

Škrbić

Đurišić-Mladenović

Mačvanin

2010

FSTR

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In order to get a better insight into the metal patterns of the investigated samples, three statistical techniques were used. Principal component analysis (PCA) and cluster analysis (CA) approved to be more powerful than Spearman's test in revealing the specific correlations among the variables (i.e. metal contents). PCA and CA pointed out the specific metal pattern of molasses on one hand and of sugar beet, extracted and dried sugar beet pulps on the other. Moreover, the chemometrical approach pointed out that main components that classified the metal behavior in the examined samples were the ones correlated with Na and K on one hand, and on the other hand with the remaining metals.Keywords: sugar beet, metals content, AAS, principal component analysis, cluster analysis *To whom correspondence should be addressed. E-mail: biljana@tf.uns.ac.rs IntroductionIt is well known fact that the chemical composition of plants reflects in general the elemental composition of the growth media. Higher plants take up metals from air (or water) by the shoots, but the absorption from soil by roots could be regarded as the main pathway of elements to plants (Kabata-Pendias and Pendias, 2000). The concentration of metallic elements in soils is associated with biological and geochemical cycles and is influenced by anthropogenic activities, such as agricultural practices, transport, industrial activities, waste treatment and disposal (He et al., 2005). Metals exist in soil in immobile (sulphides, phosphates, silicates, etc.) and mobile forms, with later being more important for understanding the migration patterns and the uptake by plants. It has been well documented that the soil contamination is likely to result in a corresponding contamination of harvested crops and the food consumers (Fergusson, 1990, Younas et al., 1998, Nan et al., 2002. Furthermore, processing of raw materials and the process conditions (additives, pH, etc.) could also influence the quality of the final food products including their metal contents (de Brujin and Bout, 1999, Mohamed, 1999).The elemental composition of sugar beet has been a subject of few previous studies investigating sugar beet quality and its influence on the quality of the final products (Mauch and Farhoudi, 1979/80, Škrbić et al., 2005a, Škrbić and Ðurišić-Mladenović, 2005. Additionaly, the heavy element contents of sugar beet has been investigated to determine the beet uptake as a consequence of either the growth on contaminated soils (Bojinova et al., 1996) or different agricultural practices (Saleh et al., 1999, Mantovi et al., 2003. The contents of alkaline and alkaline earth metals in sugar beet were also the subject of a sugar beet nutrition study by Wakeel et al. (2009). The main sugar beet product, white sugar, is referred as a very pure food product, although it contains a very small but significant amount of impurities. The control of inorganic impurities in the sugar, i.e. trace elements, is important because of its fundamental nutritional role in the diet of humans and especi...

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Iron, copper and zinc in white sugar from Serbian sugar beet refineries

Cited by 14 publications

References 5 publications

Lyophilization of a triply unsaturated phospholipid: Effects of trace metal contaminants

Lyophilization of a triply unsaturated phospholipid: Effects of trace metal contaminants

Reflexos da clarificação do caldo de cana com moringa sobre compostos inorgânicos do açúcar VHP

Determination of Metal Contents in Sugar Beet (Beta vulgaris) and Its Products: Empirical and Chemometrical Approach

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