63043
Magnesium matrix modifier
Synonym(s):
Magnesium nitrate – nitric acid solution, Magnesium modifier
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About This Item
CAS Number:
Beilstein:
4948473
MDL number:
UNSPSC Code:
12000000
eCl@ss:
32129211
PubChem Substance ID:
NACRES:
NA.21
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mol wt
Mr 256.41 g/mol
Quality Level
concentration
10.0 g/L±0.3 g/L Mg (in ~17% nitric acid)
cation traces
Ag: ≤0.001 mg/kg
As: ≤0.01 mg/kg
Cd: ≤0.001 mg/kg
Pb: ≤0.01 mg/kg
Se: ≤0.1 mg/kg
Tl: ≤0.01 mg/kg
SMILES string
[Mg]
InChI
1S/Mg
InChI key
FYYHWMGAXLPEAU-UHFFFAOYSA-N
General description
Matrix modification is a procedure for reducing volatilization and vapour-phase intrusions using a chemical reagent which acts as buffer enabling the use of higher pre-treated and atomization temperatures. The reagent causes either the interfering component to become more volatile or the analyte is converted to less volatile form. Magnesium is a first class modifier, forming oxides in the graphite furnace during heat pre-treatment. Magnesium added as nitrate has high thermal stability.[1]
Application
Magnesium along with palladium may be used as matrix modifier during platform atomization, to determine lead in solution and in soil slurries, using electrothermal atomization atomic absorption spectrometry.[2] It may also be used for determining brain manganese concentrations during graphite furnace atomic absorption spectrometry (GFAAS).[3]
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 4 Inhalation - Eye Dam. 1 - Met. Corr. 1 - Ox. Liq. 3 - Skin Corr. 1B
Supplementary Hazards
Storage Class Code
5.1B - Oxidizing hazardous materials
WGK
WGK 1
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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Journal of Analytical Atomic Spectrometry, 3, 83-87 (1988)
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Magnesium nitrate as a matrix modifier in the stabilized temperature platform furnace
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