Dual-beam spectrophotometers can meet a variety of analytical needs, from fixed materials to liquid materials. There are two types of instruments in this type, which can be selected according to the purpose and purpose of analysis and detection. This type of instrument has a wide range of applications and focuses on analysis and testing in water quality, environment, biotechnology, pharmaceuticals, materials and other fields.

Features

Low scattered light and low noise, with a wide range of measurable absorbance.
The more light is transmitted, the less spectral noise is obtained, so the wider the light range in the absorbed area can be detected. It can detect high concentration samples and has a wider range of applicable concentrations.

Stable optics of dual beams.
use WI Lamp (visible light area) and D2 The lamp (UV region) serves as the light source and can convert the wavelength according to the detection needs. The dual-beam system separates the monochromatic light, and the monochromatic light of the monochromatic device is divided into a reference beam and a sample beam directly into a sample chamber by a fan-shaped rotating mirror.

U-3900 Used UV Solutions The program (needs to connect to the computer) can easily control the device and support various quantitative analysis functions.
Special operating software can provide many functions such as detection data comparison and preview, and its analysis capabilities are more powerful.

Various accessories for liquid and solid sample detection
There are enough accessories to meet various measurement needs such as multiple samples and micro samples.

Installed with aberration correction concave grating

U-3900/3900H Spectrophotometer Seya-Namioka Monochromator, aberration correction concave grating is installed.
At the same time, it has the focus and dispersion functions of the light beam, and the optical system has strong performance. It uses fewer mirrors and only requires a shorter optical path. Therefore, the aberration ability and optical brightness can be improved.

Two types of optical systems: monochrome system ( U-3900） and double monochromatic system ( U-3900H）

There are two different spectral systems models: monochromatic system ( U-3900） and double monochromatic system ( U-3900H）。
Monochromatic systems are suitable for low-concentration samples because the light energy of the material is stronger than that of the dual monochromatic systems. The dual monochromatic system is suitable for high concentration materials because it can detect light with high absorption and less scattering.

Specification

Optional purchase

1、Points sphere attachment

(1)Measuring sample size
Transmission, absorption: 10, 20, 30, 40   mm Cuvettes with different optical paths
Reflection: A set of plate-like samples can be set. Sample size: 30   x 30 ~ 100 x 100 mm (Thickness: 10 mm the following )

(2)The incident angle of the whiteboard setting position: Sample side: incident angle 8 °，Reference side: incident angle 0 °；R/S Indicates the state of the inversion of the optical path

(3)Detector: Self-gain type PMT（0-1000V）

2、Polarization measurement accessories

Can be used to test transmission and absorption under different polarized lights
Contains two polarizers for polarization and detection respectively, and the polarization direction can be 10 °Step forward.

hardware

Double monochromator installed
The installed dual monochromator uses Hitachi's original concave focusing grating, which has excellent linearity to ensure the detection of high-concentration materials. Therefore, quantitative analysis with higher reliability can be carried out.

model :   U-3900H
Scanning speed: 300   nm/min
Slit: 2   nm

High efficiency in detecting trace materials
Use microfocused sample pools, even if 5, 25, 50 are used   µL The micro sample pool will also achieve satisfactory detection results. The following figure is using a micropool (internal volume is 25  µL） Spectral maps of nucleotides measured in the UV region. A high signal-to-noise ratio was achieved.

model :   U-3900
Scanning speed: 300   nm/min
Slit: 2   nm

software

The relevant functions of the operating software are as follows:

Easily compare measurement data
By overlapping the spectrum and Abs Measured data at different wavelengths enable easy contrast of spectral comparisons override measured data or specific wavelength values (there are 12 specific wavelengths in total, and 10 spectra can be compared) (up to 10 spectra at 12 wavelength points) for data comparisons.

File import function with preview
Using the file import tool button with preview, up to two sets of data can be previewed without opening the data file.