Keywords

Aqua regia (NGR)



Keyword Definition

Several minor variants of aqua regia digestion have been employed by the National Geochemical Reconnaissance program, for the determination of the eight ‘core’ elements (Zn, Cu, Pb, Ni, Co, Ag, Mn, Fe) by atomic absorption spectroscopy.

1 Lake

Aqua regia (details unknown)

[Proc Desc 240]

2 Stream

Aqua regia (details unknown)

[Proc Desc 241]

3 Lake

HNO3-HCl (1:4) overnight at room temp, then heat to 90°C for 1 hour

[Proc Desc 281]

4 Stream

HNO3 3ml conc, then heat to 90°C and add HCl

(no overnight digestion)

[Proc Desc 250]

5 - [total digestion – Nahanni survey, 1981]
6 Lake

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

[Proc Desc 242]

7 Lake

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

Includes Cd

[Proc Desc 169]

8 Stream

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

[Proc Desc 242]

9 Stream

HNO3 3ml conc, overnight at room temp, then heat to 90°C and add HCl

[Proc Desc 234]

10 Lake

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

Includes Cd

[Proc Desc 232]

11 Stream

HNO3 3ml conc, overnight at room temp, then add 1 ml HCl in a 90°C water bath for 2 hours; cool and add H2O; wait 2 hours.

[Proc Desc 510]

Some of these variants may be nothing more than typographical errors in the original open files.



Hierarchical classification

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

Children

Aqua regia (NGR-S) | Aqua regia (NGR-L) | Aqua regia (NGR-S, no details) | Aqua regia (NGR-L, no details) | Aqua regia (NGR-LS) | Aqua regia (NGR-S, alternate) | Aqua regia (NGR-L, alternate) | Aqua regia (NGR-S, BC)


Category: Decomposition techniques

The different kinds of analytical decompositions have been classified hierarchically. Examples: “fusion”, “acid” Taken from the “Analytical_Decompositions_SHARED” database table.


Associated Analytical Suites:

IndexSuite IDSuite Name
1  174     Barringer (lake sediments) AAS (8 elements; air-acetylene) (vague)
2  178     Chemex (lake sediments) AAS (8 elements; air-acetylene) (vague)
3  185     Chemex (stream sediments) AAS (8 elements; air-acetylene) (vague)
4  335     Chemex AAS (As; hydride evolution) 6ml decomp: 4 HNO3 1 HCL
5  388     Chemex (lake sediment) AAS (Zn, Cu, Pb, Ni, Co, Ag, Mn, Fe, Cd; air acetylene flame) – 6ml, held for 2hrs
6  400     Barringer (lake sediment) AAS (8 + Cd; air acetylene)
7  416     Barringer (lake sediment) AAS (8 + Cd; air acetylene) - decomp: 4HNO3 1HCL
8  417     Barringer (lake sediment) AAS (As; hydride evolution) - 6ml conc
9  444     Chemex (lake sediment) AAS (8 + Cd; air acetylene) - decomp: 4HNO3 1HCl
10  455     Bondar Clegg (lake sediment) AAS (8 + Cd; air acetylene) 6ml decomp: 4HNO3 1HCl ( Mn upper dl = 20,000 ppm)
11  456     Bondar Clegg (lake sediment) AAS (As; hydride evolution) 6ml decomp: 4 HNO3 1 HCl
12  495     Cantech (lake sediment) AAS (8 + Cd; air acetylene) - decomp: 4HNO3 1HCL
13  686     Bondar Clegg (lake sediment) AAS (8 + Cd; air acetylene) 6ml decomp: 4HNO3 1HCl ( Mn – no upper dl )

Associated Analytical Packages:

IndexPackage IDPackage Name
1  132     Barringer (URP lake sediment) AAS(8+Mo), FLUOR(U), COL(As)
2  134     Chemex (URP lake sediment) AAS (8+ Mo), CVAAS (Hg), COL(As), LOI (vague description)
3  137     Chemex (URP stream sediment) AAS(8+Mo), COL(W, dl=2ppm)
4  142     Chemex (URP stream sediment) AAS(8+Mo+Ba), COL(W, dl=4ppm) (vague)
5  294     Chemex (NGR lake sed 1983 samples) AAS (8+4), CVAAS (Hg), LOI500, U, ISE( F)
6  386     Chemex (NGR lake sediment) AAS (8+4), CVAAS (Hg), LOI500, U
7  387     Chemex (NGR lake sediment, 1982 samples) AAS (8+4), CVAAS (Hg), LOI500, U, ISE(F)
8  391     Barringer (NGR lake sediment) AAS (8+5), CV (Hg), COL(W), LOI500, ISE(F), NADNC(U)
9  393     Barringer (NGR lake sediment) AAS (8+5), CV (Hg), LOI500,  NADNC(U)
10  396     Barringer (NGR lake sediment) AAS (8+5), CVAAS (Hg), COL(W), LOI500, ISE(F), NADNC(U)
11  400     Barringer (NGR lake sediment) AAS (8+Cd+As+Mo+V+Sb), CVAAS (Hg), LOI500, ISE(F), NADNC(U)
12  401     Barringer (NGR lake sediment) AAS (8+5), CVAAS (Hg), LOI500, NADNC(U)
13  413     Barringer (NGR lake sediment) AAS (8+5), CVAAS (Hg), LOI, F, U(5**10)
14  415     Barringer (NGR lake sediment) AAS (8+5), CVAAS (Hg), LOI, U(5**10)
15  416     Chemex (NGR lake sediment) AAS (8+5), CVAAS (Hg), COL(W), LOI, NADNC (U-5**10)
16  419     Bondar Clegg (NGR lake sediment) AAS (8+5), CVAAS (Hg), LOI, F, U(5**10, He detector, 20s, d.l.=0.5)
17  421     Bondar Clegg (NGR lake sediment) AAS 8+6+Ba (HCLO4 only)), CVAAS (Hg),W, LOI, F, U(10**12)
18  423     Bondar Clegg (NGR lake sediment) AAS (8+5), CVAAS (Hg), LOI, F, U(10**12)
19  429     Bondar Clegg (NGR lake sediment) AAS (8+5), CV(Hg), LOI at 500C, F, U - 10**12 flux
20  430     Barringer (NGR lake sediment) AAS(8+6), DCP(Ba), CV(Hg), LOI, W, F, U
21  432     Bondar Clegg (NGR lake sediment) AAS(8+7), CV(Hg), LOI, W, F, U
22  435     Bondar Clegg (NGR lake sediment) AAS(8+7), CV(Hg), LOI, W, F,
23  440     Bondar Clegg (NGR lake sediment) AAS (8+3+(Mo+V: 2.5 ml conc)), CVAAS (Hg), LOI, F, U(10**12)
24  449     Barringer (NGR lake sediment) AAS(8+3), CV(Hg), LOI, F
25  451     Cantech (NGR lake sediment) AAS(8+3), CV(Hg - d.l. 5ppb), LOI, F [UNUSED]
26  452     Cantech (NGR lake sediment) AAS(8+3), CV(Hg), LOI, F [UNUSED]
27  460     Cantech (NGR lake sediment) AAS(8+Cd,Mo,V), CV(Hg - d.l. 5ppb), LOI, F [UNUSED]
28  467     Bondar Clegg (NGR lake sediment) AAS(8+3), CV(Hg), LOI, F
29  469     Bondar Clegg (NGR lake sediment) AAS(8+Cd,Mo,V), CV(Hg - d.l. 5ppb), LOI, F
Date modified: