Ion Chromatography Analysis of Bromate in Natural Water Samples Using Ammonia as a Preservative
Spectroscopy E-Books
Ethylenediamine, the preservative specified in EPA Method 300.1, can introduce a chromatographic artifact when analyzing samples containing elevated carbonate concentrations as a result of the formation of ethylenediamine carbamate. This artifact can compromise the ability to measure low levels of bromate in drinking water. The use of ammonia as an alternative preservative was investigated and found to produce improved bromate chromatography under challenging conditions. The improvement was seen on two different stationary phases, demonstrating that the benefit of this alternative preservative is independent of the column chemistry.
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New Optical Modeling Method Advances Thin Film Analysis Using Spectroscopic Ellipsometry
April 30th 2025Researchers at Zhejiang University have developed an advanced optical modeling approach using spectroscopic ellipsometry, significantly enhancing the non-destructive analysis of amorphous silicon oxide thin films.
Introduction to Satellite and Aerial Spectral Imaging Systems
April 28th 2025Modern remote sensing technologies have evolved from coarse-resolution multispectral sensors like MODIS and MERIS to high-resolution, multi-band systems such as Sentinel-2 MSI, Landsat OLI, and UAV-mounted spectrometers. These advancements provide greater spectral and spatial detail, enabling precise monitoring of environmental, agricultural, and land-use dynamics.
Chinese Researchers Develop Dual-Channel Probe for Biothiol Detection
April 28th 2025Researchers at Qiqihar Medical University have developed a dual-channel fluorescent probe, PYL-NBD, that enables highly sensitive, rapid, and selective detection of biothiols in food, pharmaceuticals, and living organisms.
