scTRACE Gold

Simple and reliable determination of arsenic in water



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Highlights

• Sensor for voltammetric determination of arsenic

• Complete measurement system in one sensor (working, reference, and auxiliary electrode)

• Easy to use

• No conditioning required before use

• Inexpensive sensor allows regular replacement

• Maintenance-free

• Differentiates between arsenic(III) and arsenic(V) Arsenic in water supplies Arsenic occurs in small concentrations almost everywhere also contribute to elevated arsenic concentrations in wa -

in the earth’s crust. However, elevated levels of arsenic-ter. The WHO (World Health Or ga ni za tion) recommends containing minerals and ores are found in certain parts of that the arsenic content in drinking water should not the world as a result of specific geological conditions ex ceed 10 µg/L. In many countries, in cluding the USA (volcanic rock, phosphate and sulfide mineral de po sits). and EU member states, this limit is not merely a recom-This arsenic leaches into the ground water in the form of mendation but a legal requirement. Com pli ance with this arsenite (AsO 3–) and arsenate (AsO 3–), presenting a health limit value is usually monitored by spectros copic tech-3

4

risk to the local population. Industry and agri culture can niques, which often involve very elaborate equipment.





Fast, easy, and reliable arsenic determination down to trace levels

Voltammetry using the scTRACE Gold offers a simple, surement. To operate the scTRACE Gold, simply fit it on 03

highly affordable alternative to the spectroscopic deter-the electrode shaft, immerse it into the sample, and start mination of arsenic. The electrode allows straightforward the determination. The innovative gold microwire work-and reliable monitoring of the limit value for arsenic in ing electrode eliminates the need for the laborious drinking water of 10 µg/L. In fact, the detection limit preparation and conditioning of the electrode. As well as with the scTRACE Gold is well below this concentration. saving time, this also makes it easier to use the sensor, The analysis time per sample is approximately 10 minutes since it is no longer necessary to decide whether or not only.

the electrode is ready for use. What’s more, the screen-printed Ag/AgCl reference electrode is completely main-Using the scTRACE Gold could not be easier. The sensor tenance-free.

combines all three of the electrodes needed for the mea-As with any electrode, the performance of the scTRACE

Gold deteriorates as more and more determinations are As (total)

1.20u

performed. However, the practical plug-in design means that only the cost-efficient sensor has to be replaced, so 1.00u

regular replacement is not a problem. This ensures reli-

)

able results at all times. The electrode shaft can further (A

800n

I

be used.

600n

Another advantage of voltammetric determination with the scTRACE Gold is the ability to differentiate between 400n

the more toxic As(III) and the less toxic As(V) simply through the choice of measuring parameters.

-0.20

0

0.20

0.40

U (V)

The scTRACE Gold can be used with any Metrohm β(As(total)) = 4.8 µg/L in mineral water with two standard voltammetry measuring stand.

additions



Technical specifications Working electrode

Gold microwire

Reference electrode Ag/AgCl

Auxiliary electrode Carbon

Ordering information 6.1258.000

scTRACE Gold (pack of 4 electrodes) 6.1241.080

Electrode shaft for the scTRACE Gold 6.5340.000

scTRACE Gold equipment comprised of:



6.1258.000

scTRACE Gold (pack of 4 electrodes) 6.1241.080

Electrode shaft for the scTRACE Gold 6.2753.210 Cap



6.1446.000

SGJ stopper B-14



6.1415.150

Measuring vessel, 5 mL



6.1204.200 Stirrer 6.1244.020

Drive belt

G, CH-9100 Herisau ohm A

witzerland by Metr

, printed in S

www.metrohm.com

SW

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Subject to change

Layout by Ecknauer+Schoch A 8.109.5018EN – 2013-