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APPLICATION NOTE

IARM-35B – 1-1/4Cr-1/2Mo Steel

SUMMARY

This application note is for the digestion of IARM 35B, a1-1/4Cr-1/2Mo low alloy heat resistant steel.

Instrument:

ColdBlock CBM, ICP-MS, ICP-OES

Published:

November 2023

Digestion Time:

15 Minutes

Acid Used:Aqua Regia, HF
Average ColdBlock Recovery vs. CRM:

  • 103% Chromium

  • 102% Molybdenum

  • 101% Silicon

METHODOLOGY

  1. Chiller temperature was set to -5°C
  2. 0.25g of IARM 35B was weighed and placed into a ColdBlock HF friendly test tube
  3. 12mL of Aqua Regia + 1mL HF was added
  4. Sample was digested at 90% power for 15 minutes
  5. Sample was cooled and bulked to 50mL using 2% HNO3v/v

DISCUSSION

  • Samples were digested triplicate
  • After 15 minute digestion, the samples are clear and colorless (minor amount of material settled on the bottom of tube)
  • As a safer alternative to HF, you can add solid NH4HF2(Ammonium Bi-fluoride) or NH4F (Ammonium Fluoride)
  • IARM 35B is in the form of chips
  •  

IARM 35B after topping up to 50mL

IARM 35B 1.25Cr-0.5Mo is a certified reference material (CRM) sourced from LGC ARMI. LGC ARMI, Analytical Reference Materials International, Manchester, New Hampshire, USA (February 1993)

Results

IARM 35B

Analyte:

Certified Value (wt. %)

+/-

ColdBlock 1 (wt. %)

ColdBlock 2 (wt. %)

ColdBlock 3 (wt. %)

Average

% RSD

Recovery

Al

0.016

0.0018

0.0162

0.0162

0.0142

0.016

6.1

97%

As

0.006

0.0017

0.00624

0.00607

0.00519

0.006

7.9

97%

Co

0.008

0.0011

0.0069

0.0069

0.0068

0.007

0.7

86%

Cr

1.12

0.0091

1.153

1.152

1.151

1.15

0.07

103%

Cu

0.11

0.0034

0.11

0.112

0.111

0.11

0.7

101%

Mn

0.45

0.0063

0.43

0.435

0.434

0.433

0.5

96%

Mo

0.46

0.0068

0.469

0.474

0.470

0.47

0.5

102%

Ni

0.084

0.0033

0.088

0.088

0.087

0.088

0.5

104%

Nb

0.003

0.0011

0.0031

0.0029

0.0021

0.0027

16.0

90%

S

0.015

0.0006

0.015

0.014

0.013

0.014

3.5

93%

Si

0.58

0.0114

0.60

0.59

0.58

0.59

1.4

101%

Sn

0.006

0.0006

0.0058

0.0058

0.0057

0.006

0.9

96%

Ti

0.003

0.0005

0.0028

0.0033

0.0030

0.003

5.9

101%

V

0.005

0.0018

0.0055

0.0054

0.0050

0.005

4.5

106%

Click here to download the Application Note in PDF format.

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ColdBlock Technologies Inc.
4551 Zimmerman Ave
Niagara Falls, ON L2E 3M5
info@coldblock.ca.