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Piridinyumfosfomolibdat Çöktürmesi Yoluyla Ortofosfatın Dolaylı Atomik Absorpsiyon Spektrometrik Tayini

Indirect Atomic Absorption Spectrometric Determination of Orthophosphate by Pyridiniumphosphomolybdate Precipitation

Journal Name:

  • Cumhuriyet Üniversitesi Fen Fakültesi Fen Bilimleri Dergisi

Publication Year:

  • 2009

Key Words:

Keywords (Original Language):

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Abstract (2. Language): 
Summary An indirect AAS method based on precipitation and using pyridine as a precipitating reagent for the determination of phosphate was developed without need to any solvent extraction procedure in this work. In this method, phosphate was precipated with pyridine as pyridiniumphosphomolybdate after converted to phosphomolibdic acid, the precipate was centrifuged, redissolved and was measured the molybdenium absorbance by AAS. At 313,3 nm, a calibration curve with the working range between 5-30 ug/mL P was prepared by plotting the absorbance signal of molibdenium the corresponding phosphorus concentrations (equvalent to ortophosphate and relation to soluble phosphorus). The satisfactory results were obtained in view of accuracy and precision when the developed method was applied to the beverages with cola drinks and fertilizer samples containing soluble phosphorus.
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Abstract (Original Language): 
Bu çalışmada ortofosfat tayini için çözücü ekstraksiyonu gerektirmeyen, çöktürmeye dayalı, çöktürücü olarak piridinin kullanıldığı bir dolaylı atomik absorpsiyon spektrometrik (AAS) yöntemi geliştirilmiştir. Bu yöntemde ortofosfat, fosfomolibdik asite (PMA) dönüştürülüp piridin ile piridinyumfosfomolibdat halinde çöktürülmekte, oluşan çökelek santrifüjlenerek ayrılmakta, çökeleğin çözülmesi sonrası çözeltinin molibden absorbansı AAS'de nitrözoksit/asetilen alevinde 313,3 nm'de okunmaktadır. Ayar eğrisi ortofosfat fosforu derişimine kar şı molibden absorbans sinyalini gösterecek şekilde oluşturulmuştur. Kullanılır aralık 5-30 ug/mL P olarak belirlenmiştir. Yöntem kola içeceklerinin ve çözünür fosfat içeren gübre örneklerinin analizi için uygulandığında doğruluk ve kesinlik açısından iyi sonuçlar elde edilmiştir.
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  • 2
38-50
  • Turkish

REFERENCES

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