Refractometru diferential

Refractometre diferentiale ca detector in sisteme GPC/LC/HPLC
Model Optilab T-rEX

Refractometru diferential universal pentru determinarea concentratie si masurarea dn/dc

Differential Refractometers for HPLC and UHPLC

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Caracteristici generale

Date Tehnice


Main Features
Universal Detection for Chromatography and FFF Separations
Independent of chromaphores or fluorophores, differential Refractive Index (dRI) detectors serve as accurate and versatile concentration detectors in all types of solvents. dRI is part of standard instrumentation for a variety of macromolecular characterization techniques including standard chromatography, SEC-MALS, FFF-MALS and CG-MALS
The Optilab T-rEX (refractometer with EXtended range) is a unique dRI detector for standard HPLC/GPC with 256 times the detection power and 50 times the dynamic range of every other RI detector for chromatography in existence today, making it a valuable addition to any MALS setup.

Technical Data

Differential Refractive Index  
Standard T-rEX  
Range -0.0047 – +0.0047 RIU
Peak-to-peak noise* ± 7.5 x 10-10 RIU
High Concentration Option T-rEX  
Range -0.0026 – +0.034 RIU
Peak-to-peak noise * ± 1.5 x 10-9 RIU
Absolute Refractive Index  
Range 1.2 – 1.8 RIU
Sensitivity 0.002 RIU
Band Broadening ** < 20 µL
Flow cell 7.4 µL
Inlet tubing (0.010" ID) 44 µL
Outlet tubing (0.030" ID) 370 µL
Back pressure created at inlet port < 50 psi (3.5 bar) @ 0.5 mL/min of pure water, 20°C
Maximum permissible back pressure at outlet port 30 psi (2 bar)
Wetted Materials 316 stainless steel, PTFE, fused silica
Dynamic Range 22+ bits only via digital communication
Data Acquisition Period 0.2 - 10 samples/second
Light Source 660 nm standard; other wavelengths available
Sample Temperature  
Control Range 4°C – 65°C, temperature regulated
Temperature Regulation ± 0.005°C
Safety Sensors Vapor and liquid (leak)
On-board Computer  
Display / User Interface 6.4", high resolution, LCD color touch screen display
Digital Communication Ethernet
Auxiliary I/O  
Inputs Analog In (16 bits, ± 10 V A/D), Zero dRI, Purge, Recycle In, Autoinject in, Alarm In
Ouputs Analog Out (18 bit dRI data), Autoinject Retransmit, Alarm Out, Recycle Out (to switch Orbit between waste and recycle)
Dimensions 60 cm (L) x 36 cm (W) x 17 cm (H)

* Short term peak-to-peak noise is measured as per ASTM-E1303-95(2000) using a 0.5 s collection interval (1-s time constant) and temperature set to 25°C
** Peak broadening measured over full width at half max, flow rate = 0.3 mL/min.

Optional accessories

RI Calibration Kit - Pre-made RI calibration standards are available to speed up RI calibration. Can be used to calibrate any Optilab or third-party differential RI instrument
WISH Injection Module - The Wyatt Injection System High-Pressure (WISH) is ideal for use with an Optilab dRI detector for the determination of dn/dc in "batch" mode
Microbatch Kit - Used to inject samples into the flow cell of a MALS detector, and in determining dn/dc
SysTrack - Convenient shelving for holding multiple detectors in your experimental setup
Thermos - A temperature-controlled chamber for SEC/GPC columns and FFF channels.

Analizor Dieta

Refractometru diferential Bx / nd / Diet
Model DR10

Refractometru diferential / Analizor Dieta

Differential refractometer / Diet laboratory analyser

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Caracteristici generale

Date Tehnice

Main Features
The DR-10 Easy Diet laboratory analyser is an innovative system for measuring the concentration of diet or sugar-free carbonated soft drinks. A single analyser that for concentration measurement can replace HPLC, spectrophotometry, titration and other manual systems and methods. The system is simple to use and provides accurate and consistent results without the need for a skilled operator. The analysis cycle is completely automatic and requires no sample preparation. There are no chemical reagents required or routine consumables to be replaced. While designed for the laboratory the system is rugged enough to be used at-line for fast results for samples taken directly from the line. Using this technology, it is possible as well to measure diet syrups and regular beverages.

Technical Data
Application: The instrument is a digital differential refractometer of the latest generation expressly designed for laboratory measurements in the beverage industry, where it is used for the measurement of Diet beverages
Measurement: limits: 0…20 RD
Accuracy: 0.5% of measurement, max accuracy 0.00125 RD
Measurement scales displayed: “%STANDARD”; equivalent “Total Acidity”, obtained via linear conversion (which can be set) of the RD Refractometric Degree scale (maximum conversion factor which can be set = 1000); Brix; RD Refractometric Degree
Product temperature: 5 .. 25 °C
Analysis time: 7 minutes for a complete cycle
Quantity of analyzed sample:
- Product: 100 cc for each test
- Water: 50 cc for each test

Optional accessories


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