Comparison of Three Potassium Determination Methods in Fertilizers

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SHAHBAZI KARIM; feizollahzade ardabili mahnaz; Davoodi Mohammad Hossein

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Journal: Iranian Journal of Soil Research Year:2016 | Volume:30 | Issue:1 Page(s): 25-37

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Title

Comparison of Three Potassium Determination Methods in Fertilizers

Author(s)

SHAHBAZI KARIM | feizollahzade ardabili mahnaz | Davoodi Mohammad Hossein | Issue Writer Certificate

Keywords

Flame photometric methodQ1

Volumetric tetra phenyl boron methodQ1

Gravimetric methodQ1

Abstract

A comparison of three methods for the determination of potassium in fertilizers was conducted using 26 fertilizer samples, which were chosen to represent the ones used in the country’ s agriculture. Based on physical and chemical properties, the samples were divided into three categories. The amounts of potassium oxide in fertilizers were determined by gravimetric sodium tetra phenyl boron method, volumetric sodium tetra phenyl boron method and Flame photometric method. Potassium recovery rate in the three methods were determined using analytical grade material. The results showed that the recovery rate in the three methods was satisfactory. There was no significant difference at the 5% level between the mean value of potassium oxide determined by gravimetric (22. 24%), volumetric (22. 19%) and flame photometric (22. 47 percent) methods, but the difference between Flame photometric method and volumetric method was significant at 5% level. Despite small differences in potassium content measured by Flame photometric method and volumetric method, the difference was significant in 15 fertilizers, which can be attributed to our failure to eliminate interfering factors and to use internal standard in Flame photometric method. The results showed that there was no significant difference between the two extractions methods (boiling method and shaking method). Based on the results of this study, the Flame photometric method has acceptable accuracy and precision and is applicable in all Soil, Water, and Fertilizer Laboratories in the country, thus, it can be introduced as an appropriate method along with gravimetric and Volumetric tetra phenyl boron methods that are known and used at international level.

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APA: Copy

SHAHBAZI, KARIM, feizollahzade ardabili, mahnaz, & Davoodi, Mohammad Hossein. (2016). Comparison of Three Potassium Determination Methods in Fertilizers. IRANIAN JOURNAL OF SOIL RESEARCH (FORMERLY SOIL AND WATER SCIENCES), 30(1 ), 25-37. SID. https://sid.ir/paper/159162/en

Vancouver: Copy

SHAHBAZI KARIM, feizollahzade ardabili mahnaz, Davoodi Mohammad Hossein. Comparison of Three Potassium Determination Methods in Fertilizers. IRANIAN JOURNAL OF SOIL RESEARCH (FORMERLY SOIL AND WATER SCIENCES)[Internet]. 2016;30(1 ):25-37. Available from: https://sid.ir/paper/159162/en

IEEE: Copy

KARIM SHAHBAZI, mahnaz feizollahzade ardabili, and Mohammad Hossein Davoodi, “Comparison of Three Potassium Determination Methods in Fertilizers,” IRANIAN JOURNAL OF SOIL RESEARCH (FORMERLY SOIL AND WATER SCIENCES), vol. 30, no. 1 , pp. 25–37, 2016, [Online]. Available: https://sid.ir/paper/159162/en

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