Analytical Suite Metadata

ActLabs 1G/4F-Hg – Hg by cold vapour FIMS



General Methodology:

ActLabs uses two codes for Hg analysis, but the methods appear to be identical:

4F - Hg - Cold Vapour FIMS

A 0.5 g sample is digested with aqua regia to leach out soluble compounds. The Hg in the resulting solution is oxidized to the stable divalent form. An aliquot of the digestion solution is mixed with a potassium permanganate solution. Using the flow injection cold vapor mercury technique, Hg (II) is reduced to mercury vapour using stannous chloride, argon is bubbled through the mixture of sample, carrier, and reductant solutions in a closed reaction system to liberate and transport the Hg atoms into an absorption cell. Hg is determined via the absorption of light at 253.7 nm. The maximum amount absorbed (peak height) is directly proportional to the concentration of mercury atoms in the light path. The sensitivity of the cold vapor technique is far greater than can be achieved by conventional flame AA. A Perkin Elmer FIMS 100 is used for the analysis.

[description retrieved on 2016-02-01 from http://www.actlabs.com/page.aspx?page=527&app=226&cat1=549&tp=12&lk=no&menu=64&print=yes]

1G - Aqua Regia - Hg Cold Vapour FIMS

A 0.5 g sample is digested with aqua regia at 90ºC. The Hg in the resulting solution is oxidized to the stable divalent form. Since the concentration of Hg is determined via the absorption of light at 253.7 nm by Hg vapour, Hg (II) is reduced to the volatile free atomic state using stannous chloride. Argon is bubbled through the mixture of sample and reductant solutions to liberate and to transport the Hg atoms into an absorption cell. The cell is placed in the light path of an Atomic Absorption Spectrophotometer. The maximum amount absorbed (peak height) is directly proportional to the concentration of mercury atoms in the light path. Measurement can be performed manually or automatically using a flow injection technique (FIMS).Hg analysis is performed on a Perkin Elmer FIMS 100 cold vapour Hg analyzer.

[description retrieved on 2016-03-09 from http://www.actlabs.com/page.aspx?page=728&app=226&cat1=549&tp=12&lk=no&menu=64]

Instrument:

Sample material: solid

Sample weight: unstated


Analytical Technique:

Hierarchical classification

Technique >> Spectroscopy >> Electromagnetic radiation >> Visible-ultraviolet >> Atomic >> Absorption >> Cold vapour

Children

None


Analytical Decomposition:

Hierarchical classification

Decomposition >> Aqueous dissolution >> Acid >> Moderate Acid

Children

Aqua Regia (s.l.) | HCl | HNO3 | HClO4 | HCl + … | HNO3 + …


Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  5478     Hg_CV_FIMS  5

Associated Analytical Packages:

IndexPackage IDPackage Name
1  296     ActLabs GSC TGI4 whole rock analysis (variant #1)
2  297     ActLabs GSC TGI4 whole rock analysis (variant #2)
3  298     ActLabs GSC TGI4 whole rock analysis (variant #3)
4  314     ActLabs GSC TGI4 whole rock analysis (variant #5)
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