Environmental analysis – Water

Regulatory compliance

Numerous standard-compliant methods

Water is our business. Metrohm instruments and applications meet numerous international standards (e.g., ISO, EN, EPA, ASTM, AOAC) for water analysis.

Have a look at our broad selection of standard-compliant methods!

Chromium(VI): New limit value

Potassium chromate sample
New limit value for chromium(VI) in line with EPA 218.7

California imposes a 10 µg/L limit value for chromate in drinking water. You can determine Cr(VI) by ion chromatography according to EPA method 218.7.

> Find out more!

Arsenic and mercury in water with the scTRACE Gold

Limit value of 10 μg/L arsenic for drinking water

In addition to arsenic from natural origin, anthropogenic activities contribute to the arsenic contamination of water. The World Health Organization (WHO) recommends a maximum content of 10 µg/L for drinking water.

Arsenic by anodic stripping voltammetry using the scTRACE Gold sensor

Anodic stripping voltammetry (ASV) using the scTRACE Gold offers a straightforward, highly affordable alternative to the spectroscopic determination of arsenic. The method distinguishes between As(total) and As(III). The limit of detection is significantly lower than international limit values.
scTRACE Gold sensor is also suitable for inorganic mercury detection

The scTRACE gold sensor can also determine inorganic mercury in a vast range of water samples. ASV achieves a limit of detection well below the international limit values.

Related products

scTRACE Gold electrode for arsenic and heavy metal determination in water using voltammetry

scTRACE Gold electrode 

scTRACE Gold for the analysis of As(total), As(III) and Hg

More about scTRACE Gold
Voltammetry instrument for trace analysis with potentiostat and galvanostat included

884 Professional VA

Instrument for the determination of As(total), As(III) and Hg in the laboratory

More about the 884 Professional VA
Portable analyzer for trace-level heavy metal analysis in line with WHO guidelines for drinking water

946 Portable VA Analyzer

System for the quick, simple, and reliable determination of As(total), As(III), and Hg in the field

More about the Portable VA Analyzer


Bromate in water according to EPA 300.1, 317, and 326

Chromatogram of bromate in water
Carcinogenic bromate from ozonization

Carcinogenic bromate forms during the ozonization of drinking water. Several international standards stipulate detection limits and test methods.

Great choice of approved detection techniques

Depending on the required detection limit, different detection methods can be used. Conductivity detection with chemical suppression allows the determination of bromate in the lower μg/L range. In the ng/L range, bromate can be detected by IC/MS coupling or post-column derivatization with potassium iodide and subsequent UV detection.
Bromate according to EPA 326.0

Spiked (black) and unspiked (blue) drinking water sample, post-column reaction with UV detection.

> EPA test methods and our detection limits for bromate analysis

Related products


Metals in water according to DIN 38406 Part 16

Sewage water treatment plant
Zinc, cadmium, lead, copper, thallium, nickel, and cobalt by voltammetry

Zn, Cd, Pb, Cu, Tl, Ni, and Co must be determined regularly in all types of water samples. Zn, Cd, Pb, Cu, and Tl are determined on the HMDE by anodic stripping voltammetry (ASV), Ni and Co by adsorptive stripping voltammetry (AdSV).


Further applications and products

Electrochemical research with potentiostats/galvanostats

Energy from wastewater: microbial fuel cell

Microbial fuel cells produce electricity from a wide range of organic compounds in biomass or wastewater by using living bacteria. The Autolab PGSTAT128N and the FRA32M module allow you to monitor electron transfer kinetics and interfacial properties.

Application Finder
Titration coupled with ion chromatography

Multiparameter analysis with one instrument

One single instrument takes over the entire analysis of numerous water quality parameters: TitrIC combines titration and ion chromatography while VoltIC includes voltammetry and ion chromatography. The instruments stand out with their small footprint and completely automated workflow.

TitrIC flex and VoltIC Professional

Webinar pH measurement!

Female lab worker with 827 pH Meter and Unitrode
Getting pH measurements right – small cause, large effect

The pH value is one of the most important and therefore also one of the most frequently measured quantities in analytical chemistry. This webinar shows you how to measure pH values accurately and avoid errors.

> Go to the Webinar

Testimonial: AGQ Labs

"Since we began using Metrohm instruments, we have increased our productivity per sample, in time per sample."

AGQ Labs, an international technological group, applies Metrohm ion chromatographs for environmental water analysis and food analysis.

Testimonial: Iproma

"I trust Metrohm instruments 100%. They help me to make my everyday work easy."

Iproma is an environmental laboratory dedicated to both sampling and analysis of environmental samples, e.g., drinking water, pool water, ground water, or irrigation waters.

Testimonial: AGROLAB

"After 20 years of good experience with Metrohm automated titration, we are most satisfied to have replaced our previous ion chromatography systems for a Metrohm solution, too."

AGROLAB uses Metrohm‘s automatic titration systems for determining the chemical oxygen demand (COD) in wastewater as well as ion chromatography systems for analyzing anions in leachates and wastewater.