Manganese In Biological Materials Research Articles

Simultaneous low-level determination of iodine and manganese in biological materials by radiochemical neutron activation analysis

Simultaneous low-level determination of iodine and manganese in biological materials by radiochemical neutron activation analysis

Simultaneous low-level determination of iodine and manganese in biological materials by radiochemical neutron activation analysis

A new RNAA procedure was developed for simultaneous determination of low levels of I and Mn in biological materials. The procedure is based on sample decomposition by alkaline-oxidative fusion in a mixture of Na2O2 + NaOH at 900°C followed by extraction of elementary iodine by chloroform. Subsequently, Mn is separated either by precipitation of hydrated MnO2 or by extraction of the Mn-diethyldithiocarbamate complex in chloroform. The accuracy of the RNAA procedure developed was proven by analysis of several low-level biological reference materials. Detection limits of I and Mn achievable in both institutes and the degree of interference for the Mn determination due to 56Fe(n,p)56Mn reaction with fast neutrons are discussed.

Sequential metal vapor elution analysis for the determination of Cu and Mn in biological materials and waters

The determination of copper and manganese in biological materials and river waters by sequential metal vapor elution analysis (SMVEA) using an atomic absorption detector (AA) is reported. An improved molybdenum column (open column, i.d. 1.22 mm) with three ring supporters was developed for SMVEA. An optimum flow rate of carrier gas (pure argon) for separation of metal vapors was 4.0 ml min −1. Copper and manganese peaks separated from Al, Ca, Cd, Fe, K, Mg, Na, Pb, and Zn peaks at a vaporization temperature of 1950°C and a column temperature of 1900°C. The appearing order of these metals was Cd, Zn, Pb, Cu, Na and Mn. It was understood by considering the boiling points of these metals or chlorides. The delay of appearing time is due to an interaction between the metal vapors and inside surface of the column. Under the experimental conditions, the number of theoretical plates was 11.3 for Cd, 89.6 for Cu, 160 for Na, and 258 for Mn in the improved column. Under the optimal experimental conditions, NIST biological standards and river waters were analyzed for copper and manganese. The analytical results agreed well with the certified values and the recoveries were in the range of 94 to 109%. By SMVEA, it was found that copper and manganese in biological materials and waters were determined without interference of matrix elements, after only acid digestion for biological materials and no chemical treatment for river water samples.

Determination of Manganese by Flow Injection Analysis Based on Its Catalytic Effect on the Oxidative Coupling Reaction of 3-Methyl-2-benzothiazolinone Hydrazone with N,N-Dimethylaniline

A catalytic-photometric method with a continuous-flow system was developed for the determination of nanogram amounts of manganese. The method is based on its catalytic effect on the oxidative coupling reaction of 3-methyl-2-benzothiazolinone hydrazone with N,N-dimethylaniline to form a blue-violet compound (λmax=590 nm) in the presence of hydrogen peroxide. In this reaction, 1,10-phenanthroline and citrate acted as activators for the catalytic action of manganese(II). Manganese(II) at the 2-30 ng ml−1 level can be determined at a rate of 10 samples h−1. The method can be applied to the determination of manganese in biological materials.

More on determination of manganese in biological materials.

More on determination of manganese in biological materials.

Determination of manganese in biological materials by electrothermal atomic absorption spectrometry: a review.

The great diversity of methods for measuring manganese in biological materials (serum, plasma, whole blood, urine, spinal fluid, and hair) reflects the difficulty in measuring extremely small quantities of this element. Detailed examination of these methods demonstrates that the one most used is flameless atomic absorption spectrometry. In this review we report the different instrument settings for wavelength, slit width, protection gases, graphite furnaces, type of background correction, amounts measured, and thermal programs. We give detailed recommendations by various authors for collecting samples. A thorough description of the preliminary steps and the handling of the specimen samples is also included: direct determination with or without dilution, addition of a matrix modifier or determination after ashing, with or without chelation-extraction steps. The preparation of the standards, procedures used, analytical criteria (accuracy, precision, specificity, detection limit, linearity), problems (interferences, matrix effects), and reference values and their physiological variations are also described. We give a consensus of recommendations concerning the choice of a method.

Low level determination of manganese in biological reference materials by neutron activation analysis

A simple method was developed for the low level determination of manganese in biological materials by neutron activation analysis with radiochemical separation based on manganese dioxide precipitation. Precision and accuracy of the method were tested by analyses of IAEA reference materials Animal Muscle H-4, Milk Powder A-11, Freeze Dried Animal Blood A-13, Horse Kidney H-8, and Mixed Human Diet H-9. Interferences from iron and cobalt were also evaluated.

Determination of manganese in biological materials

Abstract

Matrix effects in the determination of copper and manganese in biological materials using carbon furnace atomic absorption spectrometry

Matrix effects in the determination of copper and manganese in biological materials using carbon furnace atomic absorption spectrometry

Rapid and simple continuous radiochemical separation of copper, magnesium, zinc, and manganese in biological materials.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRapid and simple continuous radiochemical separation of copper, magnesium, zinc, and manganese in biological materialsKwang J. Hahn, Dean J. Tuma, and John L. SullivanCite this: Anal. Chem. 1968, 40, 6, 974–976Publication Date (Print):May 1, 1968Publication History Published online1 May 2002Published inissue 1 May 1968https://doi.org/10.1021/ac60262a045RIGHTS & PERMISSIONSArticle Views41Altmetric-Citations9LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (397 KB) Get e-Alerts Get e-Alerts

Use of thenoyltrifluoroacetone for the determination of manganese by activation analysis

A new procedure for the substoichiometric extraction of bivalent manganese by thenoyltrifluoroacetone into ethyl acetate has been developed and used in activation analysis. The value of the extraction constant has been found to be 3.1 × 10 −6; the pH range in which the extraction can be performed is 7.8–9.2. The influence of oxalate, citrate, tartrate, fluoride and cyanide ions has been studied. A selective substoichiometric extraction of manganese in the presence of Zr, Hf, Nb, Th, Fe and Sc is possible at pH 8–8.5, tartrate and fluoride being used as masking agents. Copper and cobalt can be screened by ammonia and cyanide respectively. The method has been used for the determination of manganese in biological materials, potassium fluoride and zirconium.

Estimation of Manganese in Biological Material by Neutron Activation Analysis.

Neutron activation analysis combined with chemical separation is a quick, accurate method for the estimation of Mn in small samples op biological materials. After nitric- sulfuric acid digestion of the activated sample, a solvent extraction separation is combined with a colorimetric yield determination. Two modified yield determination and counting techniques are examined. (auth)

The determination of manganese in biological material by activation analysis, with a note on the gamma spectrum of blood

A method is described for the determination of manganese in biological material using the technique of activation analysis. The limit of detection of the method is 0·lm/μg. Human blood contains about 2·4 μg of manganese per 100 ml, and the element is about equally distributed between cells and serum. Part of the γ spectrum of neutron-activated blood is described, and it is suggested that γ spectroscopy could be used for routine measurements of sodium and chlorine in blood.

Microdetermination of manganese in biological material by a modified catalytic method.

Microdetermination of manganese in biological material by a modified catalytic method.

A microbiological assay method for microgram quantities of manganese in biological material.

A microbiological assay method for microgram quantities of manganese in biological material.

Polarographic studies with the dropping mercury kathode. Part XLI. Microdetermination of manganese in biological material

Polarographic studies with the dropping mercury kathode. Part XLI. Microdetermination of manganese in biological material

Manganese Content of Milk

Summary 1.A modification of the colorimetric method for the determination of manganese in biological material was developed whereby the interference of the precipitation of chlorides and phosphates were avoided. 2.Colostrum milk (cows') contains much more manganese than does normal milk, the first sample after parturition being especially high in manganese. 3.Sheep milk is higher in manganese than is cows' or horse milk. 4.The manganese content of sheep milk tends to increase toward the end of lactation. Normal horse milk contains slightly more manganese than does normal cows' milk.

The colorimetric determination of manganese in biological material

The colorimetric determination of manganese in biological material