Simultaneous determination of Cr(III) and Cr(VI) with prechelation of Cr(III) using phthalate by ion interaction chromatography with a C-18 column

Speciation Analysis of Chromium in Environmental Samples

“…The limit of detection in AAS can be lowered if the flame atomizer (F-AAS) is replaced by a flameless atomizer (e.g., by an electrothermal atomizer [ET-AAS]), with a graphite cuvette that can be heated to temperatures as high as 3500 ∞C. 133,134,137,138 The principal advantages of AAS are (a) very good sensitivity, (b) low limit of detection (F-AAS from µg·cm −3 to ng·cm −3 , ET-AAS from ng·cm −3 to pg·cm −3 ), (c) excellent selectivity, (d) good precision, and (e) possible automation of the whole process. 138,162 Despite its many merits, AAS also has its defects, the most important ones being the interference caused by apparatus factors and the matrix effect.…”

“…Apart from conducting current and attenuating polarographic maxima, it is the task of the supporting electrolyte to separate polarographic waves lying close to one another and to mask interfering cations. 134,138 The concentration of the supporting electrolyte expressed in mol·dm −3 should be 100-1,000 times greater than that of the substance to be determined. The sensitivity of polarography is limited mainly by the occurrence of a capacity current.…”

Two MOFs as sensitive and selective sensors for Cr2O72− and glyphosate

“…The environmental hazards and health risks caused by Cr 2 O 7 2− and GLYP make it urgent to develop effective detection methods for them. The current technologies that can be used to detect Cr 2 O 7 2− and GLYP include gas chromatography–mass spectrometry (GC–MS), liquid chromatography‐mass spectrometry (LC–MS), atomic absorption spectrometry, ion chromatography, and electrochemical analysis 9–16 . Although these technologies have high accuracy and sensitivity, their high price, complex operation procedures, and high time cost are also prominent 17 .…”

Speciation Analysis of Chromium by Adsorptive Stripping Voltammetry in Tap and River Water Samples

“…The widely used techniques for the following determination of separate chromium species include above all graphite furnace atomic absorption spectrometry (GFAAS) [9], flame atomic absorption spectrometry (FAAS) [10] and inductively coupled plasma mass spectrometry (ICP-MS) [11]. In the literature data combined methods for simultaneous determination of Cr(VI) and Cr(III) are also described, e.g., ion interaction chromatography with UV detection [12,13], ion chromatography with ICP-MS [14]. However, detection limits of Cr(VI) determination in these methods are often unsatisfactory and, moreover, these combined procedures do not meet the requirements of routine analysis, principally because of their complicated design and expensive cost.…”