introduction: recent investigations have detected the presence of significant levels of heavy metals (chromium, lead and cadmium) in toys and other pvc products manufactured for children. in some countries, addition of compounds containing toxic metals to toys are limited or prohibited. methods: to evaluate the safety of some of the plastic toys in the city of isfahan with respect to toxic trac...

[Context & motivation:] Software traceability links which are created during the development process are subsequently underutilized because project stakeholders lack the skills they need to compose trace queries. TiQi addresses this problem by accepting natural language trace queries and transforming them to executable SQL. [Question/problem:] The TiQi engine depends on the presence of a domain...

A quantitative analysis of trace lead in tin-base lead-free solder was carried out with laser-induced plasma spectroscopy (LIPS). In order to evaluate the applicability of the technique for rapid in situ analytical purposes, measurements were performed in air at atmospheric pressure, and the emission characteristics of the plasma produced by a Q-switched Nd:YAG laser over a laser energy range o...

In this study, we have first developed a rapid and sensitive strip immunosensor based on two heterogeneously-sized gold nanoparticles (Au NPs) probes for the detection of trace lead ions in drinking water. The sensitivity was 4-fold higher than that of the conventional LFA under the optimized conditions. The visual limit of detection (LOD) of the amplified method for qualitative detection lead ...

Information about trace element composition in vegetation from tropical environments is scarce. Trace elements were evaluated on vegetation samples collected at the Atlantic Fleet Weapons Training Facilities (AFWTF) in Vieques, agricultural areas in Vieques and mainland Puerto Rico, and at the Guánica State Forest. Analyses were conducted using atomic absorption after dry-ashing of samples and ...

the study of regional variations and the anthropogenic contamination by trace toxic elements of soils is very important for environmental planning and monitoring in urban areas. soil, sediment and rocks of urban areas of kerman studied to assess the degree of pollution by trace elements as a consequence of anthropogenic sources. 37 samples were collected and analyzed by icp-ms for 29 elements. ...