7800 Graphite Furnace Atomic Absorption Spectrophotometer

The 7800 Graphite Furnace Atomic Absorption Spectrophotometer achieves the perfect combination of graphite furnace and automation technology. Integrate the graphite furnace and auto sampler into one module and solve the problems of auto sampler adjustment and optical path calibration during switching process. Checked by hundreds of laboratories, this graphite furnace system is extremely cost eﬀective.

It can be used with the ﬂame atomic absorption spectrophotometer. From high concentration ppm level to trace ppt level can all be analysed. The atomizer needs no switching, which greatly simpliﬁes operation.

Description

Main Features

6-lamp turret, multi-lamps can be preheated simultaneously.
85 position auto sampler.
heating speed: 3000℃/s; Working temperature of graphite furnace: room temperature-3000℃.
Compact design, fully automatic process control.
Self reversal and D2 background correction.

Gas Control

Separate control of in-tube gas and external gas. During the analysis, keep the gas ﬂowing outside the tube, cut oﬀ the gas in the tube at atomization stage, eﬀectively protect graphite tube, maximize the tube’s lifetime, and gain high analysis sensitivity.

Visual System of Graphite Furnace

The multi-media graphite furnace visual system can monitor the sample’s dynamic evolution during drying, ashing and residue burning process in the graphite tube. It enables convenient observation of the auto sampler’s capillary injection needle reaching the best position and depth in the tube, as well as the position of the platform placed in the graphite tube. It ensures analysis precision and graphite tube’s lifetime. Meanwhile, it is a perfect training tool.

Speciﬁcations

heating speed: 3000℃/s;
Working temperature of graphite furnace: room temperature-3000℃
Characteristic value: Cd≤1pg；Cu≤10pg
Precision RSD: Cd≤3%；Cu≤3%
Weight: 80kg
Dimension: 700*550*440mm
Safety: over current protection, alarm when the pressure of protection gas is low, automatically stop heating when over temperature
Power supply: 220VAC
Power: 6000W (instantaneous maximum power)

Graphite Furnace System

Item	Speciﬁcation
Graphite Furnace Visual System	Must be conﬁgured with graphite furnace visual system, to intuitively monitor the sample’s dynamic evolution during drying, ashing and residue burning process in the graphite tube, conveniently observe the auto sampler’s capillary injection needle reaching the best position and depth in the tube, as well as the position of the platform placed in the graphite tube. It ensures analysis precision and the graphite tube’s lifetime.
Graphite Furnace Protection	Instantly stop heating and alarm in case of graphite furnace accidentally broken
Heating Method	Longitudinally
Internal Gas Flow	Automatic adjustment
Working Temperature	Ambient – 3000℃
Max. Heating Rate	≥3000℃/s
Characteristic Value	Cd≤1pg，Cu≤10pg
Measurement Repeatability	Cd≤3%，Cu≤3%
Temperature Control Method	Power control for drying and ashing, optical control max. Power heating for atomization
Operation Software	Windows operation software
Extended Function	Hydride generator
Dimension	280550450mm

7800 Graphite Furnace Atomic Absorption Spectrophotometer