Arsenometer HMAS100
Instruction Manual v2.0
2.5. INTERFERENCE EFFECTS
The Arsenometer has been designed to test very low levels of metals in
water and as such is very sensitive. Due to the interaction of other metals
and organics in the water source, interferences can occur as with any
system of this type.
The Arsenometer is designed to function in water sources that might be suitable for
drinking. The buffers chosen mean that in many instances interferences are unlikely to
occur.
2.6. SPECIFICATIONS
Arsenometer HMAS100 Handheld
Unit
Input Power: 4.5
–5.5 V DC, 250mA.
Power Connector Type: mini USB Type B (Bulgin micro series).
Li-Ion Internal Battery
Output voltage: 3.3V Output
current: 2200mAh
Parameter
Lower Limit
⁺
Upper Limit*
Arsenic (III)
As (III)
5
500
Total Arsenic
As (III+V)
10
500
*Upper limit fixed. If the user requires values higher than this then a dilution will be needed (see page 23)
⁺
Lower limits achievable using the Handset at 60 seconds deposition.
Increased accuracy can be achieved by setting the deposition time to 120 seconds
Variability at 20ppb ± 5% with Metaware software, ± 7.5% with handheld
Accuracy dependent on sample matrix and type
