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OSR6122 Olympus PHOS Reagent- Inorganic Phosphorus


Intended Use

OSR6122 Olympus PHOS Reagent for the quantitative determination of Inorganic Phosphorus in human serum and urine on Beckman Coulter AU analyzers.

Brand: Beckman Coulter
Manufacturer SKU: OSR6122
Analyzer Type: Chemistry Analyzer
Analyzer Series: AU Analyzer Series
Test Type: General Chemistry
Test Name: Inorganic Phosphorus
SKU: OSR6122 Category:


Specifications Olympus PHOS Reagent
  • Manufacturer: Beckman Coulter OSR6122
  • Country of Origin: Ireland
  • Application: Reagent
  • Number of Tests: 4 X 590 Tests
  • Test Name: Inorganic Phosphorus
  • Test Type: General Chemistry
  • UNSPSC Code: 41116004
Understanding Inorganic Phosphorus

Inorganic phosphorus measurements help diagnose and treat various disorders related to the parathyroid gland, kidneys, and vitamin D imbalance. The method for determining phosphorus levels in protein-free blood filtrates was first described by Fiske and Subbarow in 1925. They used ammonium molybdate and aminoaphtholsulfonic acid as a reducing agent. Later, ferrous sulfate, introduced by Summer, improved the process, allowing for better specificity in dealing with different types of phosphates.

In 1953, Taussky and Shorr enhanced the method further by using ferrous ammonium sulfate, which is more stable. Then, in 1957, Dryer, Tammes, and Routh increased the sensitivity of the reaction by measuring absorbance at 340 nm instead of the previously recommended 650 to 750 nm.


The test is a modification of the method developed by Daly and Ertingshausen. In this method, inorganic phosphate reacts with molybdate to form a heteropolyacid complex. The use of a surfactant eliminates the need for a protein-free filtrate. The absorbance at 340/380 nm directly correlates with the Inorganic Phosphorus level in the sample.

OSR6122 Olympus PHOS Inorganic Phosphorus Reagent
OSR6122 Olympus PHOS Inorganic Phosphorus Reagent


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