Analytical characterization of a method for mercury determination in food using cold vapour capacitively coupled plasma microtorch optical emission spectrometry – compliance with European legislation requirements

Abstract

This paper presents the analytical characterization of a highly sensitive and inexpensive method for Hg determination.

Sono-induced cold vapour generation interfaced with capacitively coupled plasma microtorch optical emission spectrometry: analytical characterization and comparison with atomic fluorescence spectrometry

“…30,32 The reproducibility of the retention/desorption process of Hg on/from the gold lament was found to be better than 7%, and the direct heating of the lament (5 V, 1.5 A) provided a rapid desorption and a high ow rate of Hg vapour towards the plasma, and hence a high sensitivity. 30,32 The comparison method for SICV-mCCP-OES was CV-AFS with chemical Hg CV generation using 20% SnCl 2 solution stabilized in 15% HCl. Determinations were carried out using a fully automated Hydra-AF Mercury Analyzer, Teledyne Leeman Instruments (Hudson, USA).…”

“…The high speed acquisition mode of the QE65 Pro Spectrometer soware was started simultaneously with Hg vapour release to record 10 spectral episodes, each with 500 ms integration time. 24,30,32 The spectra Playback Controls application of the microspectrometer soware showed that the Hg emission signal emerged during the 2 nd -4 th episodes, and consequently only the rst ve episodes were taken into account. The microspectrometer does not allow real-time emission measurements because the CCD detector has lower temporal resolution than a photomultiplier and cannot respond to fast changes of the signal in time.…”

“…Also, no addition of HCl was made to stabilize Hg(II) in digests and calibration standards as was the case in the common chemical derivatization with SnCl 2 . [30][31][32]35 Instead, Hg was stabilized in 2% (v/v) HNO 3 . Sample solutions were appropriately diluted before analysis so that the depressive effects of the matrix containing metals, anions and residual organic matter was negligible.…”

“…[18][19][20] The analytical capability of various microplasma sources was demonstrated for the simultaneous multielemental analysis of liquid microsamples, simultaneous determination of As and Sb aer hydride generation or Hg quantication following CV generation. [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] Until now, the possibility of coupling the sono or UV promoted CV generation with a microplasma/microtorch for mercury determination has not been investigated. Thus, the aim of the present study was to investigate for the rst time the capability and usefulness of sono-induced cold vapour generation combined with capacitively coupled plasma microtorch optical emission spectrometry (SICV-mCCP-OES) for Hg determination.…”

Development and Validation of a Spectrometric Method for Cd and Pb Determination in Zeolites and Safety Evaluation

“…In this case, the atoms can be obtained by electrothermal evaporation in a graphite furnace (GF-AAS) or in a flame (F-AAS) [25][26][27]. Beside these, other non-conventional techniques can also be used to determine metal analytes in different samples [28][29][30]. For specific elements (i.e., Hg) which have high volatility, the direct measurement in solid samples (including zeolites) by thermal desorption is possible [31].…”