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Related Concept Videos

Effects of EDTA on End-Point Detection Methods01:18

Effects of EDTA on End-Point Detection Methods

420
Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
420

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Related Experiment Video

Updated: Nov 5, 2025

An In vitro System to Gauge the Thrombolytic Efficacy of Histotripsy and a Lytic Drug
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Body fluid matrix effect evaluation on the Hitachi Labospect 008 system.

Hanwool Cho1, Jin Jung1, Jeong Joong Lee1

  • 1Department of Laboratory Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.

Clinical Biochemistry
|May 14, 2021
PubMed
Summary

This study validates chemistry testing on non-standard body fluids (NSBFs), demonstrating accurate recovery rates within acceptable limits for clinical laboratories. The findings show feasibility for regulatory compliance in NSBF analysis.

Keywords:
Body fluidClinical chemistry testingHitachi LABOSPECT 008ASMatrix interferenceSpiking

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Area of Science:

  • Clinical Chemistry
  • Laboratory Medicine
  • Analytical Chemistry

Background:

  • Non-standard body fluids (NSBFs) offer valuable clinical insights but lack manufacturer validation for most chemistry reagents.
  • Clinical laboratories face challenges validating NSBF testing due to regulatory oversight and validation uncertainties.
  • This necessitates robust methods for ensuring accurate NSBF analysis.

Purpose of the Study:

  • To assess the feasibility and accuracy of high-volume chemistry testing on NSBFs using a specific analytical platform.
  • To demonstrate that individual laboratories can perform validation studies for NSBF testing.
  • To ensure compliance with regulatory accuracy requirements for NSBF analysis.

Main Methods:

  • Selected 28 high-volume chemistry tests with clinical utility for NSBF analysis.
  • Analyzed specimens using closed and open channel reagents on a LABOSPECT 008AS platform.
  • Conducted recovery studies with serum and clinical NSBF samples, defining acceptable limits as 100 ± 10% recovery.

Main Results:

  • Average percent recovery for 28 analyte/NSBF combinations ranged from 94.5% to 106.6%.
  • All tested combinations met the predefined acceptable performance limits of ±10% recovery.
  • No significant systematic matrix interference was observed in NSBF samples.

Conclusions:

  • The LABOSPECT 008AS platform effectively handles high-volume chemistry testing on NSBFs with minimal matrix interference.
  • Recovery studies are practical for individual laboratories to validate NSBF testing.
  • This study demonstrates a feasible approach for clinical laboratories to meet regulatory accuracy requirements for NSBF analysis.