RESEARCH & DEVELOPMENT OF P2O5 DETERMINATION METHOD IN PHOSPHATE FERTILIZERS AND ITS VALIDATION

Muhammad Aleem Sarwar; Sumreen Siddiq; Muhammad Faraz Anwar; Quais Muhammad Affan; Khadim Hussain; Waqas Ashraf; Hafiz Naveed Ramzan; Muhammad Arif; Muhammad Shafqat; Memoona Shehzadi; Muhammad Saeed Ashraf

doi:10.34016/pjbt.2024.21.02.934

Authors

Muhammad Aleem Sarwar Soil and Water Testing Laboratory for Research, AARI, Faisalabad
Sumreen Siddiq Soil and Water Testing Laboratory for Research, AARI, Faisalabad
Muhammad Faraz Anwar Soil and Water Testing Laboratory for Research, AARI, Faisalabad
Quais Muhammad Affan Soil and Water Testing Laboratory for Research, AARI, Faisalabad
Khadim Hussain Central Cotton Research Institute, Multan
Waqas Ashraf Soil and Water Testing Laboratory for Research, AARI, Faisalabad
Hafiz Naveed Ramzan Agronomic Research Institute, Faisalabad
Muhammad Arif Agronomic Research Institute, AARI, Faisalabad
Muhammad Shafqat Agronomic Research Station Farooqabad
Memoona Shehzadi Agronomic Research Station, Farooqabad
Muhammad Saeed Ashraf Agronomic Research Institute, AARI, Faisalabad

DOI:

https://doi.org/10.34016/pjbt.2024.21.02.934

Keywords:

Phosphate, Fertilizer, Phosphorus pentoxide, Nitrophos, DAP

Abstract

The validation of chemical measurement for Phosphorus determination in fertilizers followed a chain of experimental procedures to ascertain the performance characteristic (PC), connecting Precision, accuracy, reproducibility, recovery, linearity, limit of detection and of quantification. Performance characteristics are accomplished to ensure that analytical method fits the purpose of particular testing. This method was conducted in three stages those were preparation, testing and data processing. The standard test method for determination of P2O5 content in fertilizers used for regulatory purpose is somewhat lengthy and time taking. A modification was done to the standard method to create a more efficient approach that meets validation criteria and is suitable for analyzing advisory fertilizer samples. During the year 2023-24, comprehensive research and development activity were carried out at Soil and Water Testing Laboratory (SWTL) for Research, Faisalabad and analytical data was generated. The obtained results were processed statistically and compared with the acceptance requirements. The coefficient of determination (R²), precision and accuracy/recovery percentage respectively were 0.9996, 0.3-1.10% and 98.01-102.34%, while LOD and LOQ were 0.84 and 2.25%. Based on the results the study concluded that the modified test method applied to determine P₂O₅was appropriate for its intended use based on the acceptance criteria of performance characteristics set forth in the validation protocol and can be applied as routine method at laboratory.

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