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High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte properties and...
High-Performance Liquid Chromatography: Instrumentation00:57

High-Performance Liquid Chromatography: Instrumentation

High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...

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Updated: May 22, 2026

Sample Extraction and Simultaneous Chromatographic Quantitation of Doxorubicin and Mitomycin C Following Drug Combination Delivery in Nanoparticles to Tumor-bearing Mice
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Determination of CMPO using HPLC-UV.

Gracy Elias1, Gary S Groenewold, Bruce J Mincher

  • 1Idaho National Laboratory, Chemical and Radiation Measurement Department, P.O. Box 1625, Idaho Falls, ID 83415-2213, USA. gracy.elias@inl.gov

Journal of Chromatography. A
|May 19, 2012
PubMed
Summary

A new HPLC method accurately measures octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) in nuclear fuel solutions. This technique is crucial for monitoring CMPO degradation during radioactive waste processing.

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Area of Science:

  • Nuclear chemistry
  • Analytical chemistry
  • Separation science

Background:

  • Octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) is vital for separating radionuclides from spent nuclear fuel.
  • Radiolysis degrades CMPO, impacting separation efficiency and necessitating accurate concentration measurement.

Purpose of the Study:

  • To develop and validate a novel high-performance liquid chromatography (HPLC) method for quantifying CMPO in dodecane.
  • To assess CMPO concentration and identify degradation products in irradiated samples.

Main Methods:

  • Development of a novel HPLC method utilizing a low pH buffer, octanol/2-propanol co-solvent system, and UV detection.
  • Validation of the HPLC method for linearity, sensitivity, accuracy, and precision.
  • Identification of degradation products using electrospray ionization mass spectrometry (ESI-MS).

Main Results:

  • The developed HPLC-UV method demonstrated excellent linearity, sensitivity, accuracy, and precision for CMPO determination.
  • Analysis of irradiated CMPO samples revealed a decrease in CMPO concentration and the formation of degradation products.
  • ESI-MS identified CMPO-nitric acid complexes, explaining apparent CMPO loss in acidic conditions, irrespective of irradiation.

Conclusions:

  • The validated HPLC-UV method provides a reliable means to measure CMPO concentration in nuclear fuel processing.
  • Understanding CMPO degradation pathways and complex formation is essential for optimizing solvent extraction processes.
  • The method aids in monitoring the integrity of CMPO during radioactive material handling and separation.