EM Quant® Arsenic Test, Catalog No. 10026
Test strips and reagent for the detection
and semi-quantitative determination of arsenic ions
General
The Arsenic Test can be used for determining
arsenic in water, soil extracts, pharmaceutical products, prepared
biological specimens and liquid foods.
Under normal circumstances ground water may
contain anything up to 0.1 mg/l of arsenic. In mineral water the
arsenic concentration may be considerably higher.
Ground water contamination may be the result of
poorly laid out or unsuitably sited waste dumps. Wells near waste
dumps must therefore be checked regularly for their arsenic content.
The Arsenic Test can also be used to monitor
levels of arsenic compounds in a variety of manufacturing processes
and to check the limits in electrical components, catalysts, special
types of glass and certain electroplating baths.
Principle of the method
Hydrogen arsenide is formed when zinc and
hydrochloric acid are added to test solutions containing tri- and
pentavalent arsenic compounds. When a test strip is held in the
headspace above the solution, hydrogen arsenide causes the reaction
zone, which is impregnated with mercury (II) bromide to turn yellow to
brown. Mixed arsenic mercury halides such as AsH2HgBr are
formed.
Graduation
0 - 0.1 - 0.5 - 1.0 - 1.7 - 3mg/l (ppm) As+
Directions
- Insert a test strip halfway through the slot
in the cap of the reaction vessel, reaction zone first.
- Use the syringe to transfer 5ml of sample
solution to the reaction vessel, add 1 measuring spoon of reagent 1
and shake.
- Add 10 drops of reagent 2 (hydrochloric
acid) and attach the cap immediately to the reaction vessel.
- Leave to stand for 30 minutes, swirling
gently 2 or 3 times during this period.
- Remove the test strip, dip briefly in water,
shake gently and compare the reaction zone with the color scale.
Safety Precautions
Keep reagent 2 (32% hydrochloric acid) away from
the skin. In the event of contact, rinse well immediately with plenty
of water. Seek immediate medical attention if substance enters the
eye.
Influence of Anions
There is no interference at less than:
| 1000mg/l |
acetate, citrate, tartrate, ascorbic acid,
oxalic acid, CO32-, SO 42-,
CN-, Cl- , I-, Br-,
S2O82-, ClO4-,
Cr2O72-, CrO42-,
OCN-, EDTA |
| 500mg/l |
F-, MnO4-
, BrO3-, IO3- |
| 100mg/l |
PO43-, NO2-,
NO3- |
| 25mg/l |
SO32-,ClO3- |
| 1mg/l |
SCN-, S2- , S2O32- |
Influence of Cations
There is no interference at less than:
| 1000mg/l |
Be2+ , Pb2+ , B3+
, Cd2+ , Ca2+ , Cr3+ , Fe2+
, Fe3+, K+, Li+ , Mg2+
, Mn2+ , Mo6+ , Sr2+ , Ti4+
, U6+ , V5+ , W6+ , Zn2+
, Zr4+ , Na+ |
| 500mg/l |
Ba2+ , Rb+, Tl+ |
| 100mg/l |
Al3+ , Ce3+ , Ga3+
, Th4+ , Sn2+ |
| 25mg/l |
Ni2 |
| 5mg/l |
Co2+ , Hg+ , Hg2+
, Bi3+ |
| 1mg/l |
Sb3+ , Se4+ |
| 0.5mg/l |
Pd6+, Cu2+ |
Very slight interference is caused by 1mg/l Pd6+ or Cu2+.
Package Size
10026 EM Quant® Test strips and reagent
Arsenic Test for 100 determinations
Purchase Arsenic Test Strips 0.1-3.0 ppm EM Quant (1 PK of 100) HAZMAT fee incl
Gallade Part#: 100261
Mfr Part#: 10026-1
Brand: EMD Chemicals EM Science
Container: 1 PK of 100 Strips
Misc: HAZMAT NA1760 PGII CORROSIVE
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