Instrument Introduction
LC-2212 liquid chromatograph is an intelligent liquid chromatograph with users as the core. It has all the basic performance of conventional high-performance liquid chromatography and is compatible with reverse control liquid chromatography workstations and universal chromatography workstations. It has a novel appearance, higher reliability, stability, and ease of operation.

Instrument characteristics
Main performance characteristics
The pump head has a self flushing function, allowing for infusion without the need for manual emptying;
Adopting the "floating pump plunger rod sealing ring" technology can extend the life of the sealing ring and prevent leakage for 5000 hours;
Programmed solvent compression factor that can automatically compensate;
Complete pump types: analytical, semi prepared, and prepared;
The UV visible light detector adopts advanced holographic concave grating and dual optical path design, and the detection wavelength can be extended to the visible spectrum range;
Easy to replace flow cell for daily maintenance;
The microcontroller control technology enables the instrument to have high automation and self checking functions, and all parameters are operated by the keyboard;
Advanced circuit design combined with excellent optical path structure enables the detector to have extremely low noise and baseline stability;
Automatically calculate the cumulative ignition time and number of ignitions of tritium lamps;
All parameters can be protected against power failure;
Adopting the 7725i injection valve from Rheodyne Corporation in the United States to ensure high reliability and reproducibility of the instrument;
Building block structure design, easy to expand into gradient elution system.

Technical performance
High pressure constant current infusion pump
Flow range: 0.001ml/min to 10.000ml/min (step size set to 0.001ml/min)
Flow accuracy: ≤± 1% (1.000ml/min, 8.5MPa, water, room temperature)
Traffic stability: RSD ≤ 0.25%
Maximum withstand voltage: 40Mpa (0.001ml/min~10.000ml/min)
Pressure pulsation: ＜ 0.1MPa (flow rate 1mL/min, pressure 5MPa~10MPa)
Variable wavelength UV visible detector
Wavelength range: 190nm to 700nm
Wavelength repeatability: ± 0.01nm
Wavelength accuracy: ± 1nm
Band width: 6nm
Baseline noise: ≤ 2 × 10-5AU (methanol, 1ml/min, 254nm, 20 ℃)
Baseline drift: ≤ 4 × 10-4AU/hr (methanol, 1ml/min, stabilization time 40min, 254nm, 20 ℃)
Baseline noise: ≤ 0.5 × 10-5AU (empty pool, response time of 1 second, 20 ℃)
Baseline drift: ≤ 0.5 × 10-5AU/hr (empty pool, response time of 1 second, stabilization time of 40 minutes, 20 ℃)
Minimum detection concentration: 6.0 × 10-9g/ml (naphthalene/methanol solution)
Flow pool volume: 10ul
Optical path length: 5mm