Comparison of Potassium Content of Fertilizers by Atomic Absorption and Sodium Tetraphenylboron

Autor:	C B Loadholt, H E Hammar, M L Mccrackan, H J Webb
Rok vydání:	1967
Předmět:	law Chemistry Potassium Sodium Inorganic chemistry chemistry.chemical_element General Chemistry Atomic absorption spectroscopy law.invention
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
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