UV-VIS Spectrophotometers
JP Selecta spectrophotometers: visible and UV-VIS from 190 to 1,100 nm. European Pharmacopoeia and USP compliant. European manufacturer.
Product families (10)
- Visible range spectrophotometers
- Ultraviolet-visible spectrophotometer
- Analytical techniques
- pH meters
- Conductivity meter
- Multiparameter meter
- Digital colorimeter
- Semi-automatic clinical analyzer
- Spectrophotometers
- Digital pH meter
Frequently asked questions
What is a spectrophotometer and what is it used for in the laboratory?
A spectrophotometer is an instrument that measures the light absorbed or transmitted by a sample at a given wavelength. It is used to determine substance concentrations, analyse proteins and nucleic acids, perform enzyme kinetics and carry out quality control in chemical, pharmaceutical and clinical laboratories.
What is the difference between a single-beam and a dual-beam spectrophotometer?
A single-beam spectrophotometer measures the blank first and then the sample. A dual-beam model analyses both simultaneously, offering higher stability and accuracy in extended measurements.
Which regulations do JP Selecta spectrophotometers comply with for pharmaceutical use?
JP Selecta spectrophotometers deliver high optical performance and meet the validation requirements of the European Pharmacopoeia and USP (chapters <857> and <1857>), making them suitable for pharmaceutical analysis and quality control.
How is a laboratory spectrophotometer calibrated and verified?
Most units incorporate self-diagnostic and automatic wavelength calibration functions. Their performance can also be verified with certified reference materials (for example NIST SRM 2034) to guarantee measurement accuracy.
What is the difference between a UV-VIS spectrophotometer and a colorimeter?
A UV-VIS spectrophotometer works across the ultraviolet and visible range, allowing high-precision analysis of a wide range of compounds. A colorimeter, by contrast, only measures within the visible range through filters, making it better suited to specific colorimetric analyses.
What is a laboratory conductivity meter used for and how does it relate to spectrophotometry?
A conductivity meter measures the electrical conductivity of a solution to determine the amount of dissolved salts and ions. Spectrophotometry, on the other hand, identifies and quantifies specific compounds through light absorption, so both techniques are complementary.
Can I use a JP Selecta spectrophotometer for water and food analysis?
Yes. They are standard tools in agri-food and environmental control. They monitor colorimetric assays, quantify dye and chemical residue concentrations and determine bacterial growth in culture solutions by measuring optical density at 600 nm (OD600).