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APPLICATION NOTE

MBH 65X MGA16 – Mg/Al/Zn Cast

SUMMARY

The application note summarizes the digestion of MBH 65X MGA16, a Magnesium-Aluminum-Zinc cast alloy Certified Reference Material using ColdBlock™ Digestion Pro Series Technology.

Instrument:ColdBlock CBM sample digester, chiller, HF inserts, ICP-OES
Published:March 2026
Digestion Time:25 Minutes
Acid Used:HNO3, HF, H3BO3
Average ColdBlock Recovery vs. CRM:
  • 99% Aluminum
  • 102% Tin
  • 104% Zinc

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METHODOLOGY

  1. The chiller temperature was set to -5 °C.
  2. Approximately 0.250 g of each sample was accurately weighed and transferred into a ColdBlock digestion vessel.
  3. A reagent mixture of 20 mL 1:1 HNO3 and 1mL HF was added to each vessel.
  4. Samples were digested at 100 % power for 5 minutes, followed by 50% power for 15 minutes.
  5. 25mL of 4% H3BO3 v/v was introduced to each vessel.
  6. Samples were further digested at 100 % power for 5 minutes.
  7. Digestates were allowed to cool, then quantitatively diluted to a final volume of 50mL using a solution of 2 % HNO3 v/v.

DISCUSSION

  • The addition of boric acid facilitates the re-solubilization of insoluble fluoride species and complexes residual HF in solution.
  • Complete dissolution was achieved within 20 minutes for this high-strength nickel-based alloy

Results

65X MGA16 (Magnesium/Aluminum/Zinc (Cast)

Element 

Certified Value (wt.%)

+/-

Sample A

Sample B

Sample C

Average (ppm) 

Stdev 

RSD 

Recovery

Ag

0.0035

0.0002

0.0036

0.0036

0.0036

0.0036

0.00002

0.4%

103%

Al

6.78

0.08

6.71

6.65

6.71

6.69

0.03

0.4%

99%

Be

0.0011

0.0001

0.0011

0.0011

0.0011

0.0011

0.000001

0.1%

100%

Ca

0.0024

0.0002

0.0019

0.0028

0.0032

0.003

0.001

20.6%

110%

Ce

0.0017

0.0003

0.0018

0.0018

0.0018

0.0018

0.00004

2.1%

106%

Cd

0.0066

0.0002

0.0072

0.0073

0.0072

0.0072

0.0001

0.7%

110%

Cu

0.099

0.004

0.099

0.098

0.097

0.098

0.001

1.3%

99%

Fe

0.0073

0.0008

0.0080

0.0082

0.0080

0.0081

0.0001

1.2%

111%

La

0.0012

0.0003

0.0012

0.0012

0.0013

0.0012

0.00005

3.8%

103%

Mg

N/A

N/A

90.92

92.91

92.04

91.96

0.8

0.9%

N/A

Mn

0.271

0.007

0.284

0.286

0.286

0.285

0.001

0.3%

105%

Ni

0.0057

0.0004

0.0059

0.0059

0.0046

0.0055

0.001

11.2%

96%

Pb

0.050

0.003

0.056

0.057

0.056

0.056

0.001

1.0%

112%

Si

0.023

0.002

0.030

0.024

0.021

0.025

0.004

14.8%

107%

Sn

0.028

0.002

0.028

0.029

0.028

0.028

0.0004

0.016

102%

Zn

4.03

0.06

4.15

4.18

4.20

4.18

0.02

0.5%

104%

MBH Analytical Ltd. (2007). 65X MGA16 Magnesium–Aluminum–Zinc Cast Alloy Certified Reference Material, Certificate of Analysis. United Kingdom.

Click here to download the Application Note in PDF format.

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