Time-based on-line preconcentration cold vapour generation procedure for ultra-trace mercury determination with inductively coupled plasma atomic emission spectrometry

Abstract

A time-based sequential dispensing on-line column preconcentration procedure for mercury determination at trace levels by cold vapour generation inductively coupled plasma atomic emission spectrometry (CV-ICP-AES), by means of a unified module of a preconcentration column and a gas-liquid separator (PCGLS) is described. The complex of mercury formed on-line with ammonium pyrrolidine dithiocarbamate (APDC) is retained on the surface of the hydrophobic poly(tetrafluoroethylene) (PTFE) turnings, which are packed into the lower compartment of the PCGLS. Subsequently, mercury vapour is generated directly on the PTFE turnings by reductant SnCl(2) and separated from the liquid mixture via the PCGLS by argon purge gas. The outlet of the PCGLS is connected directly to the torch adapter of the plasma without the normal spray chamber and nebulizer. With 60-s preconcentration time and 12.0 mL min(-1) sample flow rate, the sampling frequency is 30 h(-1). The calibration curve is linear over the concentration range 0.02-5.0 microg L(-1), the detection limit ( c(L)) is 0.01 microg L(-1) and the relative standard deviation ( s(r)) is 3.1% at the 1.0 microg L(-1) level. The proposed method was evaluated by analysis of BCR CRM 278 (Mytilus Edulis) reference material and applied to the determination of total mercury in digested urine, blood and hair samples.

Mesosponge Optical Sinks for Multifunctional Mercury Ion Assessment and Recovery from Water Sources

“…[16][17][18][19][20] Moreover, toxic Hg(II) ions entering into rivers and soil as a result of exploitation abuse and smelting may progressively accumulate in humans after they become elaborated in bioactivities; as such, trace detection of Hg(II) ions is important. [21][22][23][24][25] Consequently, highly reliable, sustainable, easy-to-use, low-cost, and sensitive designs are necessary. Advances in technology have provided analytical methods that are capable of recognition and quantitation of trace Hg(II) ions.…”

An anion induced multisignaling probe for Hg2+and its application for fish kidney and liver tissue imaging studies

“…1 M HEPES buffer, pH 6.0, λex = 540 nm) with the externally added nitrate salts of Na + , K + , Mg 2+ , Ca 2+ , Cr 3+ , Mn 2+ , Fe 3+ , Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ , Ag + , Cd 2+ and Hg 2+ (100 μM). 5 Interestingly, only Hg(NO 3 ) 2 can enhance emission intensity of L, while other mercury salts such as HgCl 2 , Hg(CH 3 COO) 2 and Hg(ClO 4 ) 2 failed (Fig. 7).…”

“…S1 and Table S3 in ESI †). It 5 should be noted that the spirolactam ring is already opened in HL + as opposed to the neutral ligand L (Fig. 15).…”

Methionine–pyrene hybrid based fluorescent probe for trace level detection and estimation of Hg(II) in aqueous environmental samples: Experimental and computational studies

“…Several techniques for the determination of mercury ions in various samples have been reported over the past few years. They include spectrophotometry [5], atomic absorption spectrometry [6], inductively coupled plasma-atomic emission spectrometry (ICP-AES) [7] and voltammetry [8]. Although these methods offer good limits of detection and wide linear ranges, most of these techniques necessitate the use of sophisticated and costly instruments and require complicated operational procedure.…”