APPLICATION NOTE
Quinoa Flour – NRC KINO-1
SUMMARY
The application note summarizes the digestion of KINO-1, a Quinoa Flour Certified 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: |
|
METHODOLOGY
- Chiller temperature was set to -5°C
- 5g of each sample was weighed and placed into a ColdBlock™ Digestion vessel
- 15 mL of HNO3+ 2mL H2O2 was added
- Sample was digested at 70% power for 10 minutes
- Samples were cooled and bulked to 40mL using 2% HNO3 + 0.5% HCl v/v
DISCUSSION
- Samples were mostly clear after digestion – no visible material remains
- Samples were filtered prior to analysis
KINO-1 is a Certified Reference Material prepared at the National Research Council Canada (NRC). The source of material was food-grade quinoa flour from Northern Quinoa Production Corporation (Saskatoon, SK, Canada)
KINO-1; Quinoa Flour; Certified Reference Material; National Research Council Canada; Ottawa, Ontario Canada (November 2018)
Results
|
NRC KINO-1 (Quinoa Flour) |
||||||||||
|
Method: |
0.5g |
15mL HNO3 + 2mL H2O2 Digest at 60% power for 10 minutes. |
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|
Element |
Reference Value (mg/kg) |
95% Confidence Limits |
Sample A |
Sample B |
Sample C |
Average (ppm) |
Stdev |
% RSD |
% Recovery |
|
|
Low |
High |
|||||||||
|
As |
0.001 |
0.00062 |
0.00138 |
< |
< |
< |
N/A |
N/A |
N/A |
N/A |
|
*Ca |
720 |
620 |
820 |
705 |
759 |
662 |
708 |
39.75 |
5.6% |
98% |
|
Cd |
0.063 |
0.057 |
0.069 |
0.062 |
0.060 |
0.057 |
0.060 |
0.002 |
3.4% |
95% |
|
Fe |
84.1 |
81.5 |
86.7 |
88 |
86 |
85 |
86.5 |
1.40 |
1.6% |
103% |
|
Hg |
0.00097 |
0.00071 |
0.00123 |
< |
< |
< |
N/A |
N/A |
N/A |
N/A |
|
*K |
6010 |
5290 |
6730 |
5639 |
6000 |
6168 |
5936 |
220.60 |
3.7% |
99% |
|
*Mg |
1970 |
1670 |
2270 |
1981.458 |
1946.288 |
1945.26 |
1958 |
16.83 |
0.9% |
99% |
|
*Na |
37 |
29 |
45 |
40 |
37 |
36 |
37 |
1.70 |
4.5% |
101% |
|
Pb |
0.0028 |
0.002 |
0.0036 |
< |
< |
< |
N/A |
N/A |
N/A |
N/A |
|
Se |
0.17 |
0.15 |
0.19 |
0.18 |
0.17 |
0.13 |
0.16 |
0.02 |
12.1% |
94% |
|
Sr |
2.49 |
2.31 |
2.67 |
2.43 |
2.36 |
2.36 |
2.36 |
0.03 |
1.4% |
95% |
|
Zn |
30.6 |
29.8 |
31.4 |
36.074 |
33.274 |
29.087 |
32.8 |
2.87 |
8.8% |
107% |
Click here to download the Application Note in PDF format.
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