Atomic / Ezine
On-line speciation and determination of chromium in water samples
Date: Jul 3, 2006
Author:
In this paper, a simple, rapid, and selective on-line method for the speciation and determination of Cr(III) and Cr(VI) in aqueous solutions by ion-pairing HPLC coupled with flame atomic absorption spectrometry is described.
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Lead in China's children
Date: Jun 15, 2006
Author: David Bradley
Researchers in Beijing have carried out a meta-analysis of AAS and ICP-MS results published during 1994-2004 to obtain a countrywide picture of how the level of lead in children's blood is changing and how where they live effects their exposure to this toxic element. Perhaps predictably, the team found that those children living in urban or industrial regions had much higher levels of lead than those living in rural areas.
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Assessment of occupational exposure to welding fumes by ICP-MS
Date: Jun 7, 2006
Author:
Welding fumes are classified as possibly carcinogenic to humans (Group 2B) by the International Agency for Research on Cancer. In the current study, blood and urine concentrations of aluminum, cadmium, cobalt, chromium, manganese, nickel, lead, and zinc were monitored by inductively coupled plasma-mass spectrometry (ICP-MS).
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Coat arms alloy
Date: May 15, 2006
Author: David Bradley
Coating an alloy with a biocompatible material is a key step in making implants, such as replacement hip joints, that sit comfortably with the patient's skeleton and undergo osseointegration. A relatively new technique known as surface sol-gel processing (SSP), which is related to the well-known bulk sol-gel technique, can be used to prepare bioreactive nanostructured titanium oxides for adding a thin layer of material on a prosthetic joint. Understanding how calcium is subsequently deposited and...
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Cadmium's effect on ALS studied by Atomic Absorption Spectrophotometry
Date: May 3, 2006
Author:
Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disorder disease. Ten percent of the ALS patients are congenital. It has been shown that mutations found in the Cu,Zn-SOD cause 20% of the familial ALS due to its low enzyme activity. By atomic absorption spectrophotometry, the authors demonstrated that adding of cadmium significantly increased the content of cadmium ion, but reduced its Zn2+ content and enzyme activity of the Cu,Zn-SOD protein.
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Mercury's online treatment
Date: Apr 15, 2006
Author: David Bradley
Sample pre-treatment for analysis of metals in environmental and medical samples is often time-consuming and, worse, reagent demanding. Moreover, the usual manual approaches in the laboratory can also cause sample contamination. According to Portuguese researchers, these various drawbacks can be effectively overcome by using on-line sample pre-treatment.
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Wild mushrooms give up their secrets to atomic spectrometry
Date: Apr 3, 2006
Author:
Mineral contents of 34 species of wild mushrooms, growing particularly in the central Anatolia region in Turkey, were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES).
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Unleaded babies
Date: Mar 14, 2006
Author: David Bradley
Researchers in Canada and the US have looked at lead exposure and its putative effects on the secondary sex ratio and found that despite a large sample size and the use of sensitive biomarkers, there is no obvious association between maternal and foetal lead exposure and the secondary sex ratio among newborns.
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Applications of solid phase microextraction for the determination of metallic and organometallic species
Date: Mar 5, 2006
Author:
This paper reviews recent developments of solid phase microextraction (SPME) and its application to the analysis of organometallic species of lead, arsenic, mercury, tin, and selenium by hyphenation with HPLC-GC-atomic spectrometry.
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Fishy business in Croatia
Date: Mar 1, 2006
Author: David Bradley
Croatian scientists have obtained a profile of heavy metals present in five species of edible fish from the end flow of River Neretva in Croatia using atomic absorption spectrophotometry. Their findings suggest that eating carnivorous fish from the region is safer in terms of people absorbing heavy metals from a fish diet.
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