PEROXIDE ‘TOTAL’ FUSION ANALYSIS

Sodium peroxide fusion will result in a total metal recovery and is effective for the decomposition of sulphides and refractory minerals.

For nickel sulphide deposits this is the preferred method. This method is not suitable if sodium is required. 8-4-Acid is recommended if sodium is required.

Samples are fused with sodium peroxide in a Zirconium crucible. The fused sample is acidified with concentrated nitric and hydrochloric acids. The resulting solutions are diluted and then measured by ICP-OES and ICP-MS. All metals are solubilized.

ICP-MS

Fused samples are diluted and analyzed by Agilent 7900 ICP-MS. Calibration is performed using five synthetic calibration standards. A set of (10-20) fused certified reference material is run with every batch of samples for calibration and quality control. Fused duplicates are run every 10 samples.

ICP-OES

Samples are analyzed with a minimum of 10 certified reference materials for the required analytes, all prepared by sodium peroxide fusion. Every 10th sample is prepared and analyzed in duplicate; a blank is prepared every 30 samples and analyzed. Samples are analyzed using a Varian 735ES ICP and internal standards are used as part of the standard operating procedure.  

Elements and Detection Limits (ppm)

ElementDetection LimitUpper LimitReported By
Al0.01%25%ICP
As510,000ICP/MS
B1010,000ICP/MS
Ba310,000ICP/MS
Be35,000ICP/MS
Bi25,000ICP/MS
Ca0.01%40%ICP
Cd25,000ICP/MS
Ce0.85,000ICP/MS
Co0.25,000ICP/MS
Cr3010,000ICP/MS
Cs0.15,000ICP/MS
Cu210,000ICP/MS
Dy0.35,000ICP/MS
Er0.15,000ICP/MS
Eu0.11,000ICP/MS
Fe0.05%30%ICP
Ga0.25,000ICP/MS
Ge0.75,000ICP/MS
Gd0.15,000ICP/MS
Hf105,000ICP/MS
Ho0.21,000ICP/MS
In0.21,000ICP/MS
K0.10%25%ICP
La0.410,000ICP/MS
Li310,000ICP/MS
Mg0.01%30%ICP
Mn310,000ICP/MS
ElementDetection LimitUpper LimitReported By
Mo110,000ICP/MS
Nb2.45,000ICP/MS
Nd0.45,000ICP/MS
Ni1010,000ICP/MS
Pb0.85,000ICP/MS
Pr0.11,000ICP/MS
Rb0.45,000ICP/MS
S0.01%25%ICP
Sb25,000ICP/MS
Se85,000ICP/MS
Si0.01%30%ICP
Sm0.11,000ICP/MS
Sn0.510,000ICP/MS
Sr310,000ICP/MS
Ta0.210,000ICP/MS
Tb0.11,000ICP/MS
Te610,000ICP/MS
Th0.11,000ICP/MS
Ti0.01%25%ICP
Tl0.11,000ICP/MS
Tm0.11,000ICP/MS
U0.110,000ICP/MS
V510,000ICP/MS
W0.75,000ICP/MS
Y0.11,000ICP/MS
Yb0.11,000ICP/MS
Zn2510,000ICP/MS

8-Peroxide Fusion

This assay method is ideal for base metals such as Cu, Pb, Zn, Ni and refractory elements such as Mo, Nb, Ta, As, Cr, Ti as well as a range of other elements. Please contact us to determine the best suitability for your application.

Samples are fused with Na2O2 in Zirconium crucibles.  The fused sample is dissolved in purified water and acidified with concentrated nitric and hydrochloric acids. The solution is then measured by an Agilent 700 Series ICP-OES. Samples are analyzed with a minimum of 10 certified reference materials for the required analytes, all prepared by sodium peroxide fusion. Every 10th sample is prepared and analyzed in duplicate; a blank is prepared every 30 samples and analyzed.

Code 8 Peroxide ICP-OES Elements and Detection Limits

ElementDetection Limit
Mg0.01%
Mn0.01%
Ni0.01%
Pb0.01%
S0.01%
Sb0.01%
Si0.01 - 47 %
Ti0.01%
W0.005%
Zn0.01%

Samples are fused with sodium peroxide in a Zirconium crucible. The fused sample is acidified with concentrated nitric and hydrochloric acids. The resulting solutions are diluted and then measured by an Agilent 7900 ICP-MS. Calibration is performed using five synthetic calibration standards. A set of (10-20) fused certified reference material is run with every batch of samples for calibration and quality control. Fused duplicates are run every 10 samples.

ElementDetection Limit
Al0.001  %
As0.001-10%
Be0.00%
Bi0.00%
Ca0.01 %
Co0.001 %
Cr0.01 %
Cs0.001 %
Cu0.001 %
Fe0.05 %
Ga0.001 %
Ge0.001 %
In0.001 %
K0.1 %
Li0.001 %
Mg0.01 %
Mn0.01 %
Mo0.001  %
 
ElementDetection Limit
Nb0.001 %
Ni0.001 %
Pb0.001 %
Re0.001 %
S0.01 %
Sb0.00%
Se0.001 %
Si0.01 - 47 %
Sn0.001 %
Ta0.001 %
Te0.001 %
Th0.001 %
Ti0.01 %
Tl0.001 %
U0.001 %
W0.001 %
Zn0.001 %