Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
Flame Photometry: Lab01:16

Flame Photometry: Lab

In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A Trianalyte µPAD for Simultaneous Determination of Iron, Zinc, and Manganese Ions.

Molecules (Basel, Switzerland)·2024
Same author

Hydrogen peroxide stabilization with silica xerogel for paper-based analytical devices and its application to phenolic compounds determination.

Analytica chimica acta·2024
Same author

Multipoint monitor of beer fermentation.

Food chemistry·2024
Same author

Microfluidic paper-based analytical device for simultaneous determination of calcium and magnesium ions in human serum.

Analytica chimica acta·2024
Same author

Turbidimetric flow analysis system for the investigation of microbial growth.

Talanta·2023
Same author

Photometric flow system for the determination of serum lactate dehydrogenase activity.

Talanta·2023

Related Experiment Video

Updated: Jun 22, 2026

FLIM-FRET Measurements of Protein-Protein Interactions in Live Bacteria.
09:26

FLIM-FRET Measurements of Protein-Protein Interactions in Live Bacteria.

Published on: August 25, 2020

UV-PEDD photometry dedicated for bioanalytical uses.

Łukasz Tymecki1, Luiza Brodacka, Beata Rozum

  • 1University of Warsaw, Department of Chemistry, 1 Pasteura St., 02-093 Warsaw, Poland. luktym@chem.uw.edu.pl

The Analyst
|June 30, 2009
PubMed
Summary

A new, low-cost photometer detects p-nitrophenol for bioanalysis. This economical instrument enables fast and reproducible alkaline phosphatase (ALP) activity measurements in various setups.

More Related Videos

Submillisecond Conformational Changes in Proteins Resolved by Photothermal Beam Deflection
10:02

Submillisecond Conformational Changes in Proteins Resolved by Photothermal Beam Deflection

Published on: February 18, 2014

High Precision FRET at Single-molecule Level for Biomolecule Structure Determination
11:24

High Precision FRET at Single-molecule Level for Biomolecule Structure Determination

Published on: May 13, 2017

Related Experiment Videos

Last Updated: Jun 22, 2026

FLIM-FRET Measurements of Protein-Protein Interactions in Live Bacteria.
09:26

FLIM-FRET Measurements of Protein-Protein Interactions in Live Bacteria.

Published on: August 25, 2020

Submillisecond Conformational Changes in Proteins Resolved by Photothermal Beam Deflection
10:02

Submillisecond Conformational Changes in Proteins Resolved by Photothermal Beam Deflection

Published on: February 18, 2014

High Precision FRET at Single-molecule Level for Biomolecule Structure Determination
11:24

High Precision FRET at Single-molecule Level for Biomolecule Structure Determination

Published on: May 13, 2017

Area of Science:

  • Analytical Chemistry
  • Biotechnology
  • Biomedical Engineering

Background:

  • p-nitrophenol detection is crucial in bioanalysis.
  • Existing methods may be costly or complex.
  • Need for accessible and adaptable detection systems.

Purpose of the Study:

  • To develop and apply an economical photometer for p-nitrophenol detection.
  • To customize the instrument for specific experimental needs.
  • To validate its use in determining alkaline phosphatase activity.

Main Methods:

  • Utilized paired emitter-detector diodes (PEDDs).
  • Implemented a simple, low-cost signal transduction system.
  • Adapted the photometer for both cuvette and flow measurements.

Main Results:

  • Demonstrated a highly economical and customizable photometric system.
  • Achieved fast and reproducible determination of alkaline phosphatase (ALP) activity.
  • Validated the system's performance in experimental settings.

Conclusions:

  • The developed photometer offers a cost-effective solution for p-nitrophenol detection.
  • The system's adaptability makes it suitable for diverse bioanalytical applications.
  • Confirmed the utility of this simple photometric approach for enzyme activity assays.