Sensitive determination of chromium by inductively coupled plasma mass spectrometry using chelate-enhanced nebulized film dielectric barrier discharge vapor generation

Abstract

In this work, a novel and sensitive procedure for Cr determination by inductively coupled plasma mass spectrometry (ICP-MS) with chelate-enhanced nebulized film dielectric barrier discharge (NFDBD) vapor generation sampling system...

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

“…67,68 The modied parallel ow ablation cell included a recess in the cover to improve the gas ow pattern at the ablation site. This achieved signal durations of 0.25 ms (FW0.1M) for 44 Ca and 0.29 ms (FW0.1M) for 238 U on NIST SRM 610 using an LA repetition rate of 100 Hz. The shortest signal duration was achieved using an inner cell-tosample surface distance of 700 mm, which is several times larger than with previous fast washout ablation cells.…”

“…Ca isotopes were measured, on samples collected by space-cra from the Ryugu asteroid, by Moynier et al 184 (following the method detailed in Dai et al 185 ) who used MC-ICP-MS equipped with a collision cell to minimise Ar interference. They focussed on how Ca concentration, acid molarity and matrix elements effected IRs, and found that matching Ca intensities to within 2% of each other produced the most consistent d 40 Ca/ 44 Ca data. The radiogenic ratio, expressed as 3 40 Ca, is determined with internal normalisation to 42 Ca/ 44 Ca and was found to be reproducible to ±0.48&.…”

“…They focussed on how Ca concentration, acid molarity and matrix elements effected IRs, and found that matching Ca intensities to within 2% of each other produced the most consistent d 40 Ca/ 44 Ca data. The radiogenic ratio, expressed as 3 40 Ca, is determined with internal normalisation to 42 Ca/ 44 Ca and was found to be reproducible to ±0.48&. From this, the Moynier et al study was able to determine an average value of d 44 Ca/ 40 Ca for the Solar System (relative to SRM915a) of 0.57 ± 0.04& (2 sd).…”

“…LODs for 15 REEs were between 0.0009 and 0.11 ng L −1 . The same group of researchers 44 also used this system for the PIVG of Cr VI using sodium diethyldithiocarbamate as a chelating reagent, achieving an LOD of 0.023 μg L −1 using ICP-MS measurement.…”

Highly Sensitive Hydrogel Gratings for Real-Time Detection of Trace Hexavalent Chromium Ions in Water

“…Hexavalent chromium ion [Cr­(VI)], which is a common groundwater contaminant, is a severe threat to eco-system health and sustainability even at trace amounts. − For example, Cr­(VI) can be easily absorbed by humans through the respiratory tract and skin, leading to genetic defects and strong carcinogenesis. − Even in 2016, a US Environmental Working Group investigation found that many people were drinking tap water contaminated with Cr­(VI) due to the effluent discharge from a phosphate fertilizer plant. , Due to the harmful effect of Cr­(VI), the World Health Organization provides high-level restriction on Cr­(VI) content in drinking water (<9.7 × 10 –7 M); therefore, the detection of such trace amounts of Cr­(VI) is very important. Although such a detection can be achieved by using conventional methods such as atomic absorption spectroscopy , and inductively coupled plasma–mass spectrometry, , they are still limited by the requirements of expensive bulky instruments, professional operators, and time-consuming operation protocols. Meanwhile, emerging techniques, such as microcantilever sensors, surface plasmon resonance-based fiber optic sensors, and fiber Bragg gratings, − are developed to advance the sensitive detection of Cr­(VI).…”