APPLICATION NOTE
SUMMARY
The application note summarizes the digestion of SPIN-1, an air-dried spinach powder 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: |
|
SPIN-1 (Air Dried Spinach Powder) | ||||||||||
Element | Reference Value (mg/kg) | 95% Confidence Limits | Sample A | Sample B | Sample C | Average (ppm) | Stdev | % RSD | % Recovery | |
Low | High | |||||||||
As | 0.7 | 0.58 | 0.82 | 0.7 | 0.8 | 0.8 | 0.8 | 0.029 | 3.7% | 111% |
Se | 0.062 | 0.03 | 0.094 | 0.056 | 0.074 | 0.077 | 0.069 | 0.009 | 13.4% | 111% |
Cd | 0.265 | 0.235 | 0.295 | 0.227 | 0.265 | 0.268 | 0.254 | 0.019 | 7.4% | 96% |
Pb | 2.33 | 1.99 | 2.67 | 2.24 | 2.31 | 2.16 | 2.24 | 0.063 | 2.8% | 96% |
Sr | 140.8 | 130.9 | 150.7 | 151.5 | 155.6 | 158.0 | 155.0 | 2.717 | 1.8% | 110% |
Zn | 40.7 | 38.7 | 42.7 | 45.2 | 41.7 | 36.6 | 39.1 | 2.515 | 6.4% | 96% |