Determination of Inorganic Arsenic in Fish Oil and Fish Oil Capsules by LC-ICP-MS.

Background: As inorganic arsenic is a highly toxic compound, its concentration in foods should be determined.

Objective: Develop an analytical method for determining inorganic arsenic in fish oil and fish oil capsules.

Method: Inorganic arsenic was extracted from fish oil by heating at 80°C in 1.

[Establishment of Test Methods for Overall Migration Test into Vegetable Oil Applied to Food Contact Materials Intended for Contact with Oils and Fatty Foods].

The evaporation residue test designated in the Japanese Food Sanitation Act is used to determine the total migration amount of substances that food contact materials release into foods. Vegetable oil would be the most suitable food simulant for oils and fatty foods, but it is difficult to remove by heating due to its high boiling point, so heptane and 20％ ethanol are used as substitute food simulants in the test for plastics and rubbers. The EU has introduced an overall migration test into olive oil for plastics intended to come into contact with oils and fatty foods.

Determination of Inorganic Arsenic in Seaweed and Seafood by LC-ICP-MS: Method Validation.

Seaweed and seafood often contain both inorganic and organic arsenic compounds showing distinct toxicities. Speciation must be taken into account when determining the concentrations of arsenic compounds and how they relate to overall toxicity. An analytical method for the quantitation of inorganic arsenic was validated in seaweed and seafood.

[Trace Analysis of Lead in Copper Gluconate by Atomic Absorption Spectrometry after Separation by Co-Precipitation with Bismuth].

In order to determine trace amounts of lead in copper gluconate by atomic absorption spectrometry (AAS), the authors investigated a separation and pre-concentration procedure using a co-precipitation technique with bismuth. After ashing 2.0 g of the sample by means of a dry process, the ash was dissolved in (1→100) nitric acid and 75 μg of bismuth was added.

Three-Dimensional Visualization of Developing Neurovascular Architecture in the Craniofacial Region of Embryonic Mice.

Recent studies have highlighted the mechanism of vascular and axonal guidance to ensure proper morphogenesis and organogenesis. We aimed to perform global mapping of developing neurovascular networks during craniofacial development of embryonic mice. To this end, we developed histology-based three-dimensional (3D) reconstructions using paraffin-embedded serial sections obtained from mouse embryos.