Analytical Suite Metadata

Bondar Clegg (lake and stream sediment) CV(Hg) -  5ml conc. HNO3, 0.3ml conc. HCL



Bondar Clegg, lake and stream sediment; atomic absorption spectroscopy (mercury, cold vapour) – 5ml conc. HNO3, 0.3ml conc. HCL

General Methodology:

Mercury is determined by the Hatch and Ott procedure with some modifications. The method is described by Jonasson et al. (1973). A 0.5 gram sample reacts with 5 mL concentrated HNO3 and 0.3 mL concentrated HCl in a test tube for 10 minutes at room temperature prior to 2 hours of digestion with mixing at 90° C in a hot water bath.  After digestion, the sample solutions are cooled and diluted to 100 mL with metal-free water. The Hg present is reduced to the elemental state by the addition of 10 mL 10% w/v SnCl2 in a 10% solution of HCl. The Hg vapour is then flushed by a stream of air into an absorption cell mounted in the light path of an atomic absorption spectrophotometer. Absorption measurements are made at 253.7 nm. Detection limit = 10 ppb.

Reference:

Jonasson, I.R., Lynch, J.J. and Trip, L.J. (1973).  Field and laboratory methods used by the Geological Survey of Canada in geochemical surveys: no. 12, Mercury in ores, rocks, soils, sediments and water.  Geol Surv. Can. Paper 73-21.

Instrument: unstated

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 >> Aqua Regia (s.l.)

Children

Aqua Regia (s.s.) | Lefort | Aqua Regia (Acme/BVM) | Aqua regia (NGR) | Aqua regia (NASGLP)


Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  2200     Hg_CVAAS  10

Associated Analytical Packages:

IndexPackage IDPackage Name
1  427     Bondar Clegg (NGR stream sediment) AAS(8+6), DCP (Ba), CV(Hg), COL (W), LOI at 500°C, F, U
2  429     Bondar Clegg (NGR lake sediment) AAS (8+5), CV(Hg), LOI at 500C, F, U - 10**12 flux
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