Spectrophotometers

Atomic Absorption Spectrophotometers– LAAS Series

The flame analysis technique adopting oxygen rich air acetylene flame as the substitution for nitrous oxide-acetylene flamefor high temperature element analysis. (Only for LAAS-110A)
Automatic hollow cathode lamp changeover. The high performance HCL can be used directly.
Auto-changeover and position optimization of integrated flame/graphite furnace atomizer.
Auto-ignition, automatic spectral bandwidth selection. Fully automated wavelength scanning and peaking.
Light-controlled graphite furnace power supplier, adopting FUZZY-PID temperature control technique and dual curve working mode, ensures fast heating, accurate and stable temperature control and good temperature reproducibility. Temperature auto-correction function provided.
Graphite furnace with pneumatic control and pressure lock ensures constant pressure and reliable contact.
Perfect safety protection measures, alarm and automatic safety protection to fuel gas leakage, air pressure deficiency and abnormal flame extinction; spray chamber made of explosion proof material, all titanium burner and explosion proof stopper for flame analyses; alarm and protection function to Argon pressure deficiency, insufficient cooling water supply, over-heating and over-current etc. in graphite furnace analysis..
Adopting large scale programmable logic array and Inter IC technique and highly reliable adapters for electric design.
Easy and flexible WINDOWS Operating System, with multi-windows processing technology to observe the signal profile, the measured results and the calibration curve at the same time. Various analytical programs, data, signals and graphics can all be stored for later use.

Technical Specification:

Model No.
Main Specification	Wavelength Range	190-900nm
	Wavelength Accuracy	±0.25nm
	Resolution	Two spectral lines of Mn at 279.5nm and 279.8nm can be energy separated with the spectral bandwidth of 0.2nm and valley- peak ratio less than 30%
	Baseline Stability	≤0.004A/30min
	D₂ lamp Background Correction	1A is better than 30 times
	S-H Background Correction	1.8A better than 30 times		-
Hollow Cathode Lamps	Lamp Turret	6-lamp turret, Auto- alignment, fully automated scan and Peak-picking.		4-lamp turret, Auto-alignment, fully automated scan and peak-picking.
	Lamp Current Adjustment	Automatic adjustment and display. Wide pulse current: 0~25mA, Narrow pulse current: 0~10mA
	Lamp Power Supply mode	Powered by two pulses simultaneously
Optical System	Monochromator	Single beam, Czerny turner design grating monochromator
	Grating	1800 l/mm
	Focal Length	277mm
	Blazed Wavelength	250nm
	Spectral Bandwidth	0.1nm, 0.2nm, 0.4nm, 1.2nm automatic change
Atomizer	Flame/Graphite furnace Flame/Graphite furnace atomizer auto change over
Detection and Data Processing System	Detector	Photomultiplier with high sensitivity and wide spectral range
	Software	MS-Windows 98/Me Operating System
	Analytical Method	Working Curve Method (1^st order and 2^ndorder fitting)Sensitivity auto-correction, Standard Addition Method
	Concentration	Auto-calculation of concentration and content
	Repeatable Measurement	Maximum 20 times of repeat measurement, automatic calculation of mean value, standard deviation and relative standard deviation
	Multi-task Function	Sequential measurement of multi-elements in one sample
	Condition Reading	With model function
	Result Printing	Measurement of Data and Final Analysis report printout, editing with Excel
Flame Analysis	Burner	10cm single slot all titanium burner
	Spray Chamber	All plastic spray chamber
	Nebulizer	High efficiency glass nebulizer with metal sleeve
	Position Adjustment	Adjusting mechanism for vertical, horizontal positions and the rotation angle of the burner.
	Protection of Gas System	Fuel gas leak protection,abnormal flame extinction alarm, air-pressure deficiency protection and explosion-proof device
	Flame Ignition	Automatic
Characteristics Concentration and Detection Limit	Normal Air C₂H₂ Flame	Cu: Characteristic concentration≤0.025mg/L, Detection limit ≤0.006mg/L
	Oxygen Rich Air C₂H₂Flame	Ba: Characteristic concentration≤ 0.22mg/L
		Al: Characteristic concentration ≤ 0.4mg/L	---
	Hydride Generation	Hg: detection limit≤0.5µg/L
Graphite Furnace Analysis	Temperature Range	20~3000ºC
	Light-Controlled Temperature Range	1500ºC -3000ºC, temperature auto-correction
	Temperature Control Accuracy	≤1%
	Characteristic Mass	Cd ≤0.5 ×10^-12g, Cu ≤5 ×10^-12g,Mo ≤1×10^-11g
	Precision	RSD ≤4%
	Safety Protection	Protections for over-heating,over-current, and less cooling water and argon pressure monitoring functions
Dimension (L x W x H) mm	Main Unit	1020 (L) × 492 (W) × 537 (H)mm
	Graphite Furnace	420 (L) × 420 (W) × 460 (H) mm
Weight	Main Unit	80kg , Unpacked
	Graphite Furnace	50kg
Catalog No.		35260101	35260102	35260103