Environmental analysis – Quality control of water, soil, and air
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Environmental analysis Quality control of water, soil, and air

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 analysis – 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 dependable on-site service worldwide • is not listed on the stock exchange,...

Metrohm – customized environmental analysis for water, soil, and air samples The importance of environmental analysis The rapid growth in the world population has led to sharp increases in the consumption of energy and resources and in the production of consumer goods and che­­ cals. mi­ It is estimated that there are a total of 17 million chemical compounds on the market, including as many as 100,000 that are produced on a large industrial scale. The effects of human activities on the environment are complex and call for sensitive analytical methods and powerful analytical instruments. As...

Selected methods from the field of environmental Substances introduced into the environment are distrib- uted among the environmental compartments water (hy- drosphere), soil (pedosphere), rock (lithosphere), and air (atmosphere), as well as among the organisms living on them (biosphere). Only if we know the type and quantity of these contaminants can we protect the environment and its inhabitants. This requires internationally accepted standards, in which limits and test methods are defined. Metrohm instruments comply with numerous environ- mental standards. The following list contains a...

II. Soil The soil is a multiphase system in which the hydrosphere, atmosphere, lithosphere, and biosphere exist side by side. It serves as a source of water and nutrients for plants, is a habitat for a large number of organisms, and is an im­­ portant carbon sink. Harmful soil pollutants can easily Parameter pH value Conductivity Total organic carbon (TOC) Cyanide Anions, e.g., F–, Cl– Anions Chromium(VI) Anions and cations Trace elements Organophosporus pesticide residues Matrix Soil Soil Soil Soil Soil Solid waste Soil Solid waste Method pH measurement Conductivity measurement Titration...

Titration 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. Thus, for 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 oxidizing...

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...

Acid and base capacity according to DIN 38409-7 Acid and base capacity are parameters that describe the buffering capacity of water with respect to acids and bases. These are important sum parameters in water analysis, which characterize the pH stability of the sample. Both parameters are determined by titration to the pH values of 4.3 and 8.2. The former covers all alkaline parts by titration with hydrochloric acid, the latter all acidic parts by titration with caustic soda. Unlike standard pH electrodes, the Aquatrode Plus has a special glass membrane that guarantees rapid, correct, and...

Automation – efficient and more reproducible The MATi 01 is an excellent example of how our system solutions simplify your everyday laboratory work, whether it be sample preparation, conductivity and pH measurements, or the fully automatic determination of alkalinity and water hardness in a single run from a prepared sample beaker. Gone are the days when a different instrument was required for each parameter, after which the data had to be transferred tediously by hand into the LIMS. In addition to the time savings, more reproducible results can be achieved through automation, especially...

Ion chromatography Modern ion chromatography (IC) allows efficient separation and determination of inorganic and low-molecular organic anions and cations. Various separation mechanisms and types of detection as well as the possibility of automated sample preparation make IC a proven routine method in water and environmental analysis. to be monitored on account of their suspected car­in­ ­ c o genic properties. Before injection, the samples pass through the ultrafiltration cell mounted directly on the 858 Professional Sample Pro­ essor. Sample preparation and analysis are fully autoc matic....

Bromate in drinking water (EPA 326.0) Bromate forms during the ozonization of drink­ng water. i Several international standards stipulate detection limits and test methods. Depending on the required detection limit, different detection methods can be used. Conduc­ ti­­­­ detection with sequential suppression allows the vity de­­ termination of bromate in the lower µg/L range. In the ng/L range bromate can be detected by means of IC/MS coupling or post-column derivatization with potassium iodide and subsequent UV detection. tap water sample spiked with 1 µg/L bromate unspiked tap water...