An alternative method for the determination of element concentrations in schizophrenic, lung cancer and leukaemia patient bloods

Concentration of the elements present in schizophrenic, lung cancer and leukaemia patients' bloods were determined using energy-dispersive X-ray fluorescence (EDXRF) method. EDXRF spectrometer with an annular 241Am and 55Fe sources was applied for the analysis of blood samples. A sample preparation procedure suitable for the EDXRF, the experimental approach, analytical method used in this study and the results were presented. EDXRF technique has been successfully used for the determination of elements present in blood. © 2004 Elsevier Ltd. All rights reserved

Effect of activated charcoal on some phenolic compounds of apple juice

The effect of activated charcoal on the content of several phenolic compounds in apple juice has been studied. In this study, 0, 0.5, 1.0, 2.0 and 3.0 g/L amounts of activated charcoal were added into apple juice. Apple juice samples were then shaken gently for 0, 5, 10, 20 and 30 min, respectively. The quantitative analysis of phenolic compounds using high-performance liquid chromatography with diode-array detection was carried out. Considerable reduction in the content of phenolic compounds (gallic acid, chlorogenic acid, caffeic acid, p-cumaric acid, quercetin, phloridzin, (+) -catechin, catechol, (-) -epicatechin and protocatechuic acid) of apple juice was found. The highest decrement in the content of phenolic compounds was obtained at 3.0 g/L activated charcoal mixed for 5 min. The length of mixing period did not seem to have any more effect on the content of phenolic compounds of apple juice

Effect of analysis time on detection limit by energy dispersive X-ray fluorescence spectrometry

The influence of analysis time on detection limits in energy dispersive X-ray spectrometry was experimentally investigated. We utilized a high resolution Si(Li) detector (full width half maximum=160 eV at 5.9 keV) with a Camberra DSA-1000 desktop spectrum analyzer and Am-241 and Cd-109 radioactive point sources to collect X-ray spectra. The results showed that the detection limit decreased with increasing analysis time

Determination of iodine and calcium concentrations in the bread improver using EDXRF

A study was made on the determination of elemental composition of the bread improver using energy dispersive X-ray fluorescence. Enrichment of I and Ca was seen in the bread improver. Concentration of I with an annular 241Am radioactive source and concentration of Ca with an annular 55Fe radioactive source were determined by using standard addition method in 2π geometry. A Si(Li) detector and a multichannel analyzer were used to measure I and Ca concentrations in the bread improver. © 2002 Elsevier Science Ltd. All rights reserved

TÜRKİYE'NİN FARKLI BÖLGELERİNDE ÜRETİLEN DEĞİŞİK TİPTE UNLARIN MİNERAL MADDE MİKTARLARI

Bu araştırmada Türkiye'nin 7 ayrı bölgesine ait 19 farklı ilde un üretimi yapan 30 fabrikadan sağlanan (30 adet Tip 1, 30 adet Tip 2 ve 26 adet Tip 3) toplam 86 un örneğinin kalsiyum, potasyum, magnezyum, demir, çinko, bakır ve mangan miktarları açısından incelenmiştir. Un tipleri açısından ortalama mineral maddelerden; potasyum, magnezyum, demir, mangan değerleri arasında önemli farklılıklar olduğu, diğer özelliklerdeki farklılıkların ise istatistiksel olarak önemli olmadığı tespit edilmiştir. Farklı fabrikalara ait unların mineral maddelerden; kalsiyum, potasyum, demir, çinko, bakır, mangan değerleri arasındaki farklılıklar istatistiksel olarak önemli bulunmuştur

MINERAL CONTENTS OF VARIOUS FLOUR TYPES PRODUCED IN DIFFERENT REGION OF TÜRKİYE

In this study, calcium, potassium, magnesium, iron, zinc, copper and mangan values of 86 wheat flour samples (30 Type 1, 30 Type 2 and 26 Type 3) from 30 different factories in 19 different city of 7 different region of Türkiye were examined. Significant differences in average mineral (potassium, magnesium, iron, mangan) values were observed among 86 flour samples in terms of flour types. Statistically, differences (variations) in other properties were not found important. Variations amon flour samples from different factories in minerals (calcium, potassium, iron, zinc, copper, mangan) were found to be statistically important

Determination of seven water-soluble vitamins in tarhana, a traditional Turkish cereal food, by high-performance liquid chromatography

A reversed-phase high-performance liquid chromatographic procedure has been developed for determination of water-soluble vitamins (ascorbic acid, niacin, panthothenic acid (vitamin B5), pyridoxine (vitamin B6), thiamine (vitamin B1), folic acid, and riboflavin (vitamin B 2)) in tarhana samples, a traditional Turkish cereal food. Sample-treatment entails SPE with Sep-Pak C18 (500-mg) cartridges. The water-soluble vitamins were analyzed by HPLC on a Discovery C-18 150 mm x 4.6 mm column with 0.1 mol L-1 KH2PO4 (pH 7.0)-methanol, 90:10, as mobile phase (0.7 mL min-1) in isocratic mode. Identification of compounds was achieved by comparing their retention times and UV spectra with those of standards stored in a data bank. The detection limits ranged from 0.1 to 0.5 mg L-1. The accuracy of the method was tested by measuring average recovery; values ranged between 96.51 and 99.40%