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Magnesium matrix modifier

for graphite furnace-AAS

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Synonym(s):
Magnesium nitrate – nitric acid solution, Magnesium modifier
CAS Number:
Beilstein/REAXYS Number:
4948473
MDL number:
eCl@ss:
32129211
PubChem Substance ID:
NACRES:
NA.21

grade

for graphite furnace-AAS

Quality Level

mol wt

Mr 256.41 g/mol

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

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.

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. It may also be used for determining brain manganese concentrations during graphite furnace atomic absorption spectrometry (GFAAS).

signalword

Danger

Hazard Classifications

Acute Tox. 4 Inhalation - Eye Dam. 1 - Met. Corr. 1 - Ox. Liq. 3 - Skin Corr. 1B

supp_hazards

Storage Class

5.1B - Oxidizing hazardous materials

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter


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