SUMMARY
The application note summarizes the digestion of NIST 1573a, a tomato leaves standard reference material using ColdBlock™ Digestion Pro Series Technology.
Instrument: | ColdBlock CBM (with quartz test tubes), chiller, ICP-MS & ICP-OES |
Published: | July 2024 |
Digestion Time: | 20 Minutes |
Acid Used: | HNO3 & H2O2 |
Average ColdBlock Recovery vs. CRM: |
|
NIST 1573a after bulk up to 40mL
Table 1 – Results of HNO3 & H2O2 digestion – NIST 1573a Tomato Leaves |
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Method: |
0.5g |
10mL HNO3 65% power for 20 minutes, then slowly add 2mL of 30% H2O2 |
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Element |
Consensus Value (ppm) |
+/- |
Sample A |
Sample B |
Sample C |
Average (ppm) |
Stdev |
RSD |
Recovery |
As |
0.1126 |
0.0024 |
0.1276 |
0.1272 |
0.1108 |
0.1 |
0.0078 |
6.4% |
108% |
B |
33.13 |
0.42 |
33.19 |
34.81 |
32.17 |
33.39 |
1.09 |
3.3% |
101% |
Ca |
50450 |
550 |
47435 |
46451 |
49915 |
47934 |
1457 |
3.0% |
95% |
Cd |
1.517 |
0.027 |
1.455 |
1.453 |
1.507 |
1.472 |
0.025 |
1.7% |
97% |
Cr |
1.988 |
0.034 |
1.947 |
1.849 |
1.844 |
1.880 |
0.047 |
2.5% |
95% |
Cu |
4.7 |
0.14 |
4.57 |
4.78 |
4.80 |
4.7 |
0.1 |
2.2% |
100% |
Fe |
367.5 |
4.3 |
351.8 |
401.0 |
380.2 |
377.7 |
20.2 |
5.3% |
103% |
Hg |
0.0341 |
0.0015 |
0.0413 |
0.0415 |
0.0412 |
0.0413 |
0.0001 |
0.3% |
121% |
K |
26760 |
480 |
25391 |
26497 |
28696 |
26861 |
1374 |
5.1% |
100% |
Mn |
246.3 |
7.1 |
235.1 |
249.5 |
268.0 |
250.9 |
13.5 |
5.4% |
102% |
Na |
136.1 |
3.7 |
126.4 |
145.7 |
146.6 |
139.6 |
9.3 |
6.7% |
103% |
P |
2161 |
28 |
2138 |
2200 |
2230 |
2189 |
38.3 |
1.7% |
101% |
Rb |
14.83 |
0.31 |
13.03 |
14.34 |
14.17 |
13.85 |
0.58 |
4.2% |
93% |
Sb |
0.0619 |
0.0032 |
0.0567 |
0.0578 |
0.0567 |
0.0571 |
0.0005 |
0.9% |
92% |
V |
0.835 |
0.034 |
0.853 |
0.804 |
0.854 |
0.837 |
0.023 |
2.8% |
100% |
Zn |
30.94 |
0.55 |
30.60 |
28.33 |
31.49 |
30.14 |
1.3 |
4.4% |
97% |
Table 2 – Results of HNO3 + HF & H2O2 digestion (to improve recovery of Aluminum) |
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Method: |
0.5g |
10mL HNO3 + HF 65% power for 20 minutes, then slowly add 2mL of 30% H2O2 |
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Element |
Consensus Value (ppm) |
+/- |
Sample A |
Sample B |
Sample C |
Average (ppm) |
Stdev |
RSD |
Recovery |
Al |
598.4 |
7.1 |
522.5 |
538.3 |
539.1 |
533.3 |
7.6 |
1.4% |
89% |
Click here to download the Application Note in PDF format.
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4551 Zimmerman Ave
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info@coldblock.ca.