Water Analysis – Quality control of water
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Water Analysis Quality control of water

Metrohm... • is the global market leader in titration • offers a complete portfolio for NIR and Raman analysis, in addition to all of the methods of • ion analyses – titration, voltammetry, and ion chromatography • is a Swiss company and manufactures exclusively in Switzerland • grants a 3-year instrument warranty and a 10-year warranty on chemical suppressors for • anion chromatography • provides you with unparalleled application expertise • offers you more than 1800 applications free of charge • supports you with expert service through local representatives and regional support centers •...

Metrohm – customized water analysis Harmful substances in water Water is the source and basis of all life. It is essential for metabolism and is our most important foodstuff. As a solvent and transporting agent it carries not only the vital minerals and nutrients, but also, increasingly, harmful pollutants, which bioaccumulate in aquatic or terrestrial organisms. Within the context of quality control and risk assessment there is a need in the water laboratory for cost-effective and fast instruments and methods that can deal with the ever more complex spectrum of harmful substances, the...

There is more than we’d like in water ... 04 Thales of Miletus (ca. 625–545 BC), one of the first Greek natural philosophers and one of the «Seven Wise Men», considered water as the source of all things, to which everything returns. This perception takes on a completely new meaning in view of the 1700 substances, mainly of anthropogenic origin, that can today be detected in water. As a source of food and energy, during use in irrigation, as a solvent, cleaning agent, or coolant, and also as a means of transportation and discharge system for effluents, water becomes contaminated with...

Selected standards relating to water analysis The standards listed below describe the measurement of conductivity and pH value as well as the determination of anions and cations in various types of water. Metrohm analyzers meet all the minimum requirements and limits set in the respective standards. Whilst some standards Parameter describe simultaneous determination of several analytes (e.g., EPA 300.1), one and the same analyte (e.g., chloride) can also be determined using different analytical techniques, depending on the prescribed limit and the sample matrix. All types of water Acid rain...

The pH value is probably the most frequently measured parameter of aqueous solutions – ranging from mobile measurement in drinking water, surface water, groundwater, and wastewater through to precise measurement of the pH value of water for pharmaceutical use. Wher­ ever pH values are determined, Metrohm offers the ideal solution for every application. Drinking water «Two-in-one» – for indoors and outdoors The new Metrohm meters are «two in one»: precision instruments for measurements in the laboratory and robust companions for mobile use in the field and at the process. Optional battery...

856 Conductivity Module and 867 pH Module Thanks to the five-ring measuring cells the new 856 Conductivity Module is ideal for measurements in drink­­ ing water according to DIN EN 27888 and EPA 120.1. The large range of linearity allows various types of water to be measured without recalibration. By combining the 856 Conductivity Module with the 867 pH Module it is even possible to measure the conductivity and pH value simultaneously in the same vessel. Five-ring conductivity measuring cells The main feature of the new five-ring measuring cells is their large range of linearity (0.005–100...

Carbonate hardness (temporary hardness, alkalinity, or acid binding capacity) Temporary hardness is determined by endpoint titration with 0.1 mol/L HCl. The combined pH glass electrode Aqua­­ trode plus was developed specifically for use in aqueous solutions. The rapidly responding membrane glass and the fixed ground-joint diaphragm ensure precise, low-noise measurements, and titration results with waters ranging from ultrapure to water with a high salt content. Acid and base capacity according to DIN 38409-7 Acid and base capacity are parameters that describe the buffering capacity of...

Titration – Sum parameters Sum parameters usually characterize similar chemical, physical, physicochemical or biological features of different components. Their advantage is in the fast determination and informative value, which allow the sample to be evaluated quickly. As an example, electrical conductivity provides valuable information on the salt content of a water sample. Another important sum parameter is the chemical oxidizability of water components, which provides indications of the type and quantity of organic material present in the sample. According to the oxidizing power of the...

The MATi 12 system for fully automatic COD determination Chemical oxygen demand according to DIN 38409-44 and ASTM D1252 The chemical oxygen demand (COD) is a measured value for the sum of the substances in a certain volume of water that can be oxidized by chromate. Chromate is a much stronger oxidizing agent than permanganate, which is why it also oxidizes most organic compounds practically completely into CO2. In sewage treatment plants, COD is regarded as a valuable indicator for evaluating treatment performance. For volumetric determination of the COD, the sample of water is heated over...

Fully automated water analyzing system Comprehensive water analysis includes the determination of different sum parameters (e.g., conductivity, pH value, alkalinity, hardness) and several individual substances (e.g., ions). Frequently, these parameters – even in case of a high sample throughput – are sequentially determined on different instruments. This is very time consuming and requires repetitive sample preparations and expensive laboratory space. Why not save time and benefit from synergy effects by combining Metrohm devices in a single system that carries out all the mentioned...