| Autor: |
C B Loadholt, H E Hammar, M L Mccrackan, H J Webb |
| Rok vydání: |
1967 |
| Předmět: |
|
| Zdroj: |
Journal of AOAC INTERNATIONAL. 50:5-7 |
| ISSN: |
0004-5756 |
| DOI: |
10.1093/jaoac/50.1.5 |
| Popis: |
Atomic absorption spectrophotometry is a rapid and simple screening method for determining potassium in fertilizers, especially when a large number of samples are processed. The potassium content of 1190 fertilizer samples was determined by both atomic absorption (4038Å) at a dilution of 1:400 and by the sodium tetraphenylboron method; correlation between the two methods was significant (r = 0.96). Triplicate analyses of 101 samples by each method showed precision of 0.229% by STPB and 0.424% by atomic absorption; standard deviation of the difference between the two procedures was 0.50%. Other elements normally found in fertilizers did not interfere at 4038Å. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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