A sequential multielement separation scheme for determination of As, Mn, Mo, Cu and Zn in human milk by neutron activation analysis

Dang, H.S.; Desai, H.B.; Jaiswal, D. D.; Kayasth, S. R.; Somasundaram, S.

doi:10.1007/bf02525354

Cited by 17 publications

(3 citation statements)

References 7 publications

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“…The concentrations found in cow's milk range on average from 30 to 35 ug/1. Dang et al (1983) indicate that human milk from Indian women contains values ranging from 0.1 to 1.7 ug/1 and cow's milk between 30 and 70 ug/1. The minimum dietary requirements for molybdenum to maintain optimal health of humans are currently unknown.…”

Section: Average Mineral Contentsmentioning

confidence: 99%

Determination of mineral contents in different kinds of milk and estimation of dietary intake in infants

Biego

Joyeux

Hartemann

et al. 1998

Food Additives and Contaminants

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Concentrations of 11 minerals were determined in six kinds of milk (cow's milk-based formulae, breast-milk, soya milk, bottled milk, dried milk and evaporated milk). The contents of copper, magnesium, molybdenum, aluminium, barium and nickel were higher in soya milk than in any other kinds of milk. Except for nickel in soya milk, the dietary intakes of minerals were below or close to the intake recommended by the FAO/WHO.

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Section: Average Mineral Contentsmentioning

confidence: 99%

Determination of mineral contents in different kinds of milk and estimation of dietary intake in infants

Biego

Joyeux

Hartemann

et al. 1998

Food Additives and Contaminants

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“…The Mo requirement for infants is closely reflected in the Mo content of breast milk (5-63 ndg) with the level depending on the time after parturition (ref. [11][12][13][14].…”

Section: 3)mentioning

confidence: 99%

Determination of molybdenum in biological materials

Marczenko¹,

Łobiński²

1991

Pure and Applied Chemistry

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-The accurate determination of molybdenum in biological materials is of considerable importance because of the essential role played by this element in human metabolism. However, data on the Mo content in biological samples and especially in clinical materials are often contradictory due to the inadequate sensitivity and reliability of the instrumental techniques used and to insufficient control of contamination during the analytical procedure. Despite recent developments in Mo determination by electrothermal atomic absorption and plasma atomic emission spectrometry, measurements in human blood and serum remain beyond the scope of most hospital laboratories involved in the usual routine testing. Further development of atomic spectrometric methods or a wider availability of neutron activation analysis may provide more data which is required for a better understanding of the nutritional role of Mo and its metabolism in humans. Advantages and limitations of the analytical techniques used for the determination of Mo in biological materials are critically discussed with particular attention given to clinical samples. The most common sources of analytical error are discussed and methods for their reduction are given. BIOCHEMICAL A N D CLINICAL BACKGROUNDAs early as 1953 (ref. 1) molybdenum was recognized to be an essential trace element for many species including man. It is a component of many enzymes responsible for the initial stages of nitrogen, carbon and sulfur metabolism of plants, animals and man and participates in a large number of enzymatic reactions (ref. 2,3).There is an absolute dependence by plants on Mo as it plays a vital role in the earth nitrogen cycle where it is involved both in nitrate reduction and nitrogen fixation.Although molybdenum is essential for animals it shows evidence of toxicity at high levels. General symptoms of excess doses of Mo for ruminants are: retarded growth, decreased milk and meat production, osteoporosis, severe gastroenteritis and coma (ref. Molybdenum intoxication depends on its speciation and is also influenced by the uptake of other elements such as S"' , W"', Cu, Pb and Zn.In humans, a deficiency of Mo in the diet may lead to some healths deffects. Diets with a low Mo content (20 pg/kg) adversely effect growth and may lead to neurogical disorders and even early death (ref. 6). Molybdenum also seems to play a positive role in the prevention of tooth decay (ref. 7). On the other hand, excess doses of Mo can be detrimental, persons having a diet rich in Mo being susceptible to gout, uricemia and xanthinuria and often suffer from an inflammation of extremities due to excess uric acid deposition (ref. 8,9).The practice of supplementing human diets with trace elements has stimulated studies of Mo as an essential nutrient. Several studies using diets providing between 1 and 14 pg of Mo per kg body weight per day report that an optimal diet should provide about 2 pg Mo per kg body weight per day (ref. 7). This result is comparable with a daily intake of 128 pg Mo prop...

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“…7 The Mo requirement for infants is closely reflected in the Mo content of breast milk (5-63 ng g À1 ) with the level depending on the time after parturition. [8][9][10] The level of Mo in plants depends on the soil content and soil conditions. 11 As Mo is taken up by plants in the form of the MoO 4…”

Section: Introductionmentioning

confidence: 99%

A comparative study on PVC based sensors in determination of molybdenum

et al. 2011

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The proposed work described the synthesis of neutral ionophores; 4,8-diaza-3,3,10,10-tetramethyl-1,2dithiacyclodecane (S 1 ), 5,8-diaza-3,3,10,10-tetramethyl-1,2 dithiacyclodecane-N,N 00 -diacetic acid (S 2 ) and N,N 00 -bis(2,2-dimethyl-2-mercaptoethyl)ethylenediamine-N,N-diacetic acid (S 3 ) used for comparative analysis in determination of molybdenum(V) as PVC-based membrane sensors. The best result was obtained with sensor no. 7 based on S 3 ionophore with membrane composition (w/w, mg%); 5.0(S) : 30.0(PVC) : 5.0(KTpClPB) : 60.0(o-NPOE) showing a working range of 2.3 Â 10 À7 -1.0 Â 10 À2 M with a detection limit of 1.2 Â 10 À7 M and a toleration of non-aqueous media up to 15% with slope of 11.7 mV/decade of activity. The sensor no. 7 can also be used to assess the Mo(V) concentration in different natural samples (water bodies, soils, root nodules and urine samples) with comparative analysis of ETAAS and spectrophotometric methods. The proposed sensor no. 7 can be used 2.5 months without any distortion in results after that leaching of ionophore was observed from the membrane phase in aqueous solutions of Mo(V). The proposed sensor has shown a good dynamic response time of 11 s.

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A sequential multielement separation scheme for determination of As, Mn, Mo, Cu and Zn in human milk by neutron activation analysis

Cited by 17 publications

References 7 publications

Determination of mineral contents in different kinds of milk and estimation of dietary intake in infants

Determination of mineral contents in different kinds of milk and estimation of dietary intake in infants

Determination of molybdenum in biological materials

A comparative study on PVC based sensors in determination of molybdenum

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