Inductively coupled plasma mass spectrometry (ICP-MS) is a highly sophisticated multi-element analytical technique that is increasingly being used for trace analysis in various industries including analytical laboratories. The ICP-MS technique is capable of analysis down to sub parts-per-trillion (ppt) detection limits whereby the lowest detection limits can be achieved only in a cleanroom environment. Because water is used early in tests for trace elemental analysis with ICP-MS, it is obvious that any contamination from the water can compromise an entire analysis. Therefore, the water used must be of a high analytical grade quality (e.g., ASTM Type I water). The objective of the analytical test series described below is to ensure that the ultrapure water generated by the arium pro UV water system has a high purity level (in this case, free of all nondetectable metal elements) and can be used without any problems for trace analysis of elements performed with ICP-MS devices…
Tag: <span>ultrapure water</span>
In situ hybridization (ISH) for localization of DNA/RNA hybrids in cytological preparations was first described in 1969 by Gall and Pardue. This method enables mRNA transcripts to be detected in tissue sections. Unlike expression analyses based on polymerase chain reactions, the exact localization of the target transcripts can be identified within the tissue…
Plants must be capable of responding to climatic fluctuations, diurnal rhythms, available supplies of water and nutrients, and insect attacks and infestations. To ensure such responses, plants need a network of regulating substances called phytohormones. These substances enable plants to respond to both biotic and abiotic stresses by initiating a cascade of orchestrated actions, and to trigger development-specific processes. In this article, we will discuss a highly sensitive analytical method for quantitative determination of phytohormones. The main representatives of the plant hormones are jasmonic acid (JA), cytokines, auxins, abscisic acid, salicylic acid, gibberellins, and strigolactones.