Analytical Suite Metadata

Chemex (lake and stream sediments) AAS (8 elements; air-acetylene) (NGR aqua regia #8)

Chemex, lake sediments; atomic absorption spectroscopy  (Zn, Cu, Pb, Ni, Co, Ag, Mn, Fe; air-acetylene)

Aqua regia digestion details:

  • HNO3-HCl (1:4) 6ml conc, overnight at room temp, then heat to 90°C for 2 hours 


General Methodology:

A 1 gram sample was reacted with 6 ml of a mixture of 4M HCL and M HNO3 in a test-tube overnight at room temperature.  After the overnight digestion, the test-tube was immersed in a hot water bath at room temperature and brought up to 90°C and held at this temperature for 2 hours with periodic shaking.  The sample solution was then diluted to 20 ml with metal free water and mixed.  The element was determined by atomic absorption spectroscopy using an air-acetylene flame.  Background corrections were made for Pb, Ni, Co and Ag.

Instrument: unstated

Sample material: solid

Sample weight: unstated

Analytical Technique:

Hierarchical classification

Technique >> Spectroscopy >> Electromagnetic radiation >> Visible-ultraviolet >> Atomic >> Absorption >> Flame >> C2H2/Air



Analytical Decomposition:

Hierarchical classification

Decomposition >> Aqueous dissolution >> Acid >> Moderate Acid >> Aqua Regia (s.l.) >> Aqua regia (NGR) >> Aqua regia (NGR-S)



Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  2107     Zn_AAS  2
2  2108     Cu_AAS  2
3  2109     Pb_AAS  2
4  2110     Ni_AAS  2
5  2111     Co_AAS  2
6  2112     Ag_AAS  0.2
7  2113     Mn_AAS  5
8  2114     Fe_AAS  0.02

Associated Analytical Packages:

IndexPackage IDPackage Name
1  147     Chemex (URP lake sediment) AAS (8+Mo), CVAAS (Hg), COL(As), ISE(F), LOI
2  150     Chemex (URP lake sediment) AAS (8+Mo), CVAAS (Hg), COL(As), LOI (detailed description)
3  364     Chemex (URP lake sediment) AAS(8+Mo+As), LOI
4  365     Chemex (URP lake sediment) AAS(8+Mo+V+As), LOI
5  366     Chemex (URP lake sediment) AAS(8+Mo+As), ISE(F), LOI
6  390     Chemex (NGR stream sediment) AAS (8+3), cold vapour (Hg), COL(W), NADNC(U)
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