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APPLICATION NOTE

Corn Bran – NRC BRAN-1

SUMMARY

The application note summarizes the digestion of BRAN-1, a Corn Bran Reference Material using ColdBlock Digestion Pro Series Technology.

Instrument: ColdBlock CBM sample digester, chiller & ICP-MS
Published: March 2023
Digestion Time: 10 Minutes
Acid Used: HNO3 & H2O2
Average ColdBlock Recovery vs. CRM:
  • 94% Cadmium
  • 114% Lead
  • 99% Selenium

METHODOLOGY

  1. Chiller temperature  was set to -5°C
  2. 0.5g of each sample was weighed and placed into a ColdBlock Digestion vessel
  3. 15 mL of HNO3 + 2mL H2O2 was added
  4. Sample was digested at 70% power for 10  minutes
  5. Samples were cooled  and bulked to 40mL  using 2% HNO3 + 0.5% HClv/v

DISCUSSION

  • A minor of amount of material settled on the bottom of the tube after bulking
  • Samples were filtered prior to analysis

BRAN-1 is a Reference Material prepared from refined corn bran obtained from A.E Staley Manufacturing Co., Decatur, IL USA. BRAN-1, formerly known as RM 8433 was prepared by the Centre for Land and Biological resources Research, Agriculture Canada. BRAN-1; Corn Bran; Reference Material; National Research Council Canada; Ottawa, Ontario Canada (September 2015)

Results

NRC BRAN-1 (Corn Bran)

Method:

0.5g

15mL HNO3 + 2mL H2O2 Digest at 60% power for 10 minutes.

 

 

Element

 

Reference Value (mg/kg)

95% Confidence Limits

 

Sample A

 

Sample B

 

Sample C

 

Average (ppm)

 

 

Stdev

 

% RSD

 

%

Recovery

Low

High

Ca

420

382

458

326

486

461

424

70.349

16.6%

101%

Cd

0.012

0.007

0.017

0.011

0.011

0.012

0.011

0.0005

4.2%

94%

Cu

2.47

2.07

2.87

2.56

2.69

2.68

2.65

0.058

2.2%

107%

Fe

14.8

13

16.6

15.3

16.5

15.9

15.9

0.469

3.0%

107%

K

566

491

641

600

606

600

602

2.676

0.4%

106%

Mg

818

759

877

802

781

786

789

9.010

1.1%

97%

Mn

2.55

2.26

2.84

2.52

2.59

2.55

2.55

0.031

1.2%

100%

Na

430

399

461

432

422

433

429

4.955

1.2%

100%

Pb

0.14

0.106

0.174

0.147

0.17

0.163

0.16

0.010

6.0%

114%

Rb

0.5

0.2

0.8

0.5

0.5

0.5

0.5

0.030

6.3%

97%

Se

0.045

0.037

0.053

0.056

0.036

0.042

0.045

0.008

18.8%

99%

Sr

4.6

N/A

N/A

5.164

5.24

5.075

5.2

0.067

1.3%

112%

Zn

18.6

16.4

20.8

19.609

19.178

20.976

19.9

0.766

3.8%

107%

Click here to download the Application Note in PDF format.

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