UV-Absorption, cold vapor technique (CVAAS)

Analytical wavelength:

253,7 nm

UV source:

Electrodeless low-pressure mercury discharge lamp

Stabilization method:

Reference beam technique

Optical cell:

Entirely made of fused silica, ca. 230 mm length

Optical cell heating:

Approx. 50° C

Stripping gas:

argon (optional nitrogen), 4-6 l/h,stabilized with electronic mass flow controller

Autosampler:

53 place random access, turntable-type

Sample vials:

10 ml, glass; aluminium foil disc covers as accessory

Heating coil temperature:

ca. 98° C

Detection limit:

< 80 pg Hg

Measuring range:

10 ng/l ... 10 µg/l

Zero drift:

Auto zero before each measurement

Measuring duration:

Typical 60 Ð 280 seconds

Software:

AULA-WIN, WindowsTM based

Electrical power supply:

115 V / 230 V~; 50 - 60 Hz, consumption ca. 100 W
(AULA 254-ASD: 120 W)

Dimensions:

Autosampler-reaction unit: 345 x 295 x 330 mm (WxHxD)
Photometer: 450 x 150 x 350 mm (WxHxD)

Bench space requirements:

ca. 90 x 70 cm (W x D), excl. PC

Weight:

Approx. 14 kg total (excl. PC)

Amalgamation on gold surface and subsequent release by quick heating

Measuring range:

1 ng/l ~ 5 µg/l

Detection limit:

< 8 pg Hg