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Toxic sunscreen testing

Date: Aug 15, 2009

Author: David Bradley

Simultaneous determination of an inorganic UV filter used in sunscreen, titanium dioxide, and several minor, trace or toxic elements has been undertaken using inductively coupled plasma atomic emission spectroscopy (ICP-AES). The multi-element analysis of sunscreen creams and lotions was compared with atomic absorption spectroscopic data.

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The analysis of heavy metals in Chinese herbal medicine by flow injection-mercury hydride system and graphite furnace atomic absorption spectrometry

Date: Aug 3, 2009

Author:

Simple and robust atomic absorption spectrometry methods were developed to determine the contents of arsenic, lead and mercury in Chinese herbal medicine products or Chinese proprietary medicine.

Read More thumbnail image: The analysis of heavy metals in Chinese herbal medicine by flow injection-mercury hydride system and graphite furnace atomic absorption spectrometry

Marine surfactant soaks up heavy metal

Date: Jul 15, 2009

Author: David Bradley

Atomic absorption spectroscopy (AAS) and other techniques have been used to demonstrate the effectiveness of a natural surfactant molecule in removing heavy metals from solutions for potential bioremediation applications.

Read More thumbnail image: Marine surfactant soaks up heavy metal

Determination of selenium and tellurium in basalt rock reference materials by isotope dilution hydride generation-ICP-MS

Date: Jul 3, 2009

Author:

A new isotope dilution-hydride generation-inductively coupled plasma-mass spectrometry method for the simultaneous determination of Se and Te has been applied to basalts and compared to previous work.

Read More thumbnail image: Determination of selenium and tellurium in basalt rock reference materials by isotope dilution hydride generation-ICP-MS

Cannabis blow back

Date: Jun 15, 2009

Author: David Bradley

Using a highly sensitive new test (online column-switching valve liquid chromatography tandem mass spectrometry (LC-MS/MS) selected reaction monitoring (SRM) method), European scientists have found "convincing evidence" that marijuana smoke damages DNA in ways that could increase the risk of cancer.

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Elemental content in brown rice by ICP-AES reveals the evolution of Asian cultivated rice

Date: Jun 1, 2009

Author:

The phylogenetic relationship for classification traits and eight mineral elements in brown rice (Oryza sativa L.) from Yunnan Province in China was carried out using microwave assisted digestion followed by inductively coupled plasma atomic emission spectroscopy

Read More thumbnail image: Elemental content in brown rice by ICP-AES reveals the evolution of Asian cultivated rice

Ionic liquid boost for AAS

Date: May 15, 2009

Author: David Bradley

Researchers in Argentina have used room temperature ionic liquids (RTILs) as an online pre-concentration medium for flame atomic absorption spectrometry analysis of trace cadmium in plastic food packaging materials.

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A spectroscopic approach to assess trace-heavy metal contents in contaminated floodplain soils via spectrally active soil components

Date: May 4, 2009

Author:

Soil samples from grassland plots in the Hase floodplain near Osnabruck were analyzed using visible and near-infrared laboratory spectroscopy paralleled by atomic-absorption spectrometry, automated combustion for Corg quantification, and texture analysis.

Read More thumbnail image: A spectroscopic approach to assess trace-heavy metal contents in contaminated floodplain soils via spectrally active soil components

Tyson's toxic technique

Date: Apr 15, 2009

Author: David Bradley

The first accurate test for arsenic compounds in contaminated soil has been developed by US chemists. Their atomic emission approach to the problem could provide improved environmental and health assessments of contaminated sites.

Read More thumbnail image: Tysons toxic technique

The impact of fluoridated milks on the availability of trace elements in milk

Date: Apr 6, 2009

Author:

In vitro simulated gastrointestinal digestion with enzymatic steps was used to measure and compare the availability of trace Fe, Zn, Cu, Cr, Mo and Se, measured by ICP-MS, in pasteurised skimmed (0.3% fat) and whole (4% fat) milk with different fluoride concentrations and in non-F and F UHT-processed 4% fat milks.

Read More thumbnail image: The impact of fluoridated milks on the availability of trace elements in milk
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