determination of nitrogen News
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BUCHI DuMaster D-480 – Profit even more
You cope with high sample loads for QC and declaration purposes with little changes in the sample matrices. Our solution «Protein Determination Dumas» offers sample throughput of up to 300 samples per day, overnight operation without supervision and an easy-to-use operation concept. Costs cutting per analysis combined with simple maintenance Cost effective thanks to the new ...
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New ASTM method simplifies determination of Kjeldahl nitrogen
The ASTM recently published method D8001 describing the determination of total nitrogen, total Kjeldahl nitrogen, and total phosphorous. The new method applies persulfate digestion with subsequent determination of Kjeldahl nitrogen by ion chromatography; no prior distillation of the matrix is required. Total Kjeldahl and total nitrogen are commonly determined by titration after distillation of ...
By Metrohm AG
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Historic England use our Golden Gate to carbon date bone
Select Science recently ran a story featuring our Golden Gate ATR accessory. Historic England, formerly English Heritage, were prescreening collagen content in archaeological bone samples at Oxford University. Radiocarbon dating of bone samples depends on the integrity of bone collagen, the substance which tells analysts the age of the bone. So integrity tests were essential for the selection ...
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Quality control of NPK fertilizers - Rapid and reliable analysis by thermometric titration
Metrohm is pleased to present several titrimetric applications for the fast and straightforward determination of macronutrients such as sulfate, ammonium, potassium, and phosphate in NPK fertilizers. The reaction endpoint is determined using a thermometric sensor. Unlike competing methods such as gravimetric analysis or flame photometry, thermometric titration usually requires no sample ...
By Metrohm AG
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Analytik Jena AG: Analytik Jena present at ARABLAB 2012
At ARABLAB 2012 in Dubai, which begins today, Analytik Jena AG presents itself at booth 427 in the German Pavilion with its current instrument portfolio for Analytical Instrumentation and Life Science and with a new solution for laboratory information management systems (LIMS). ARABLAB is one of the analytical industry's most important annual platforms for the growth markets of the Middle East, ...
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ASTM D1607 - 91(2011) standard test method for nitrogen dioxide content of the atmosphere (griess-saltzman reaction)
Nitrogen dioxide plays an important role in photochemical smog-forming reactions and, in sufficient concentrations, is deleterious to health, agriculture, materials, and visibility. In combustion processes, significant amounts of nitric oxide (NO) may be produced by combination of atmospheric nitrogen and oxygen; at ambient temperatures NO can be converted to NO2 by oxygen and other atmospheric ...
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Mobile metal analyser simplifies onsite nitrogen and carbon analysis tasks
Leading mobile OES spectrometer company, SPECTRO Analytical Instruments has introduced a new high-performance mobile metal analyser that is capable of rapidly determining the nitrogen content in duplex steels with spark excitation and quickly identifying low alloy steels using carbon in arc excitation. The SPECTROTEST TXC25’s compact, thin sample probe enables hard-to-reach sample areas such as ...
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AJ Forum Provides Information on Innovative Applications in Elemental Analysis
Users and customers exchange information on the latest innovations and potential applications in organic elemental analysis Jena, Germany, November 6, 2018 — The AJ Forum was once again held at Analytik Jena. Users and customers exchange information here on the latest innovations and potential applications in organic elemental analysis. Numerous participants from research and industry had ...
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AJ Forum provides information on innovative applications in elemental analysis
The AJ Forum was once again held at Analytik Jena. Users and customers exchange information here on the latest innovations and potential applications in organic elemental analysis. Numerous participants from research and industry had come to see the most recent developments and listen to lectures on practical applications. The agenda ranged from live product demonstrations – including the ...
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BOD Analysis in Wastewater Applications
The Biochemical Oxygen Demand (BOD) is a relevant parameter for the assessment of the pollution of sewage. Its fast analyses allows the optimal control of a waste water treatment plant (WWTP). LAR's BioMonitor is an online BOD analyzer for the determination of the total biochemical oxygen demand. The analyser determines the degradation of nitrogen as well as carbon compounds within minutes. This ...
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ASTM D3608 - 95(2011) standard test method for nitrogen oxides (combined) content in the atmosphere by the griess-saltzman reaction
Both NO2 and NO play an important role in photochemical-smog-forming reactions. In sufficient concentrations NO2 is deleterious to health, agriculture, materials, and visibility. In combustion processes, significant amounts of NO may be produced by combination of atmospheric nitrogen and oxygen; at ambient temperatures, NO can be converted to NO2 by oxygen and other atmospheric oxidants. ...
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Online BOD Analysis in Waste Water Treatment Plants
The biochemical oxygen demand (BOD) reflects the demand of oxygen that is needed for the degradation of all biological degradable substances in water. Thus, the BOD, also called biological oxygen demand, is an important indicator for the assessment of the pollution of water. Its fast analyses allows the optimal control of a waste water treatment plant (WWTP) with regard to nutrient dosage and/or ...
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Online BOD Analysis in Waste Water Treatment Plants
The biochemical oxygen demand (BOD) reflects the demand of oxygen that is needed for the degradation of all biological degradable substances in water. Thus, the BOD, also called biological oxygen demand, is an important indicator for the assessment of the pollution of water. Its fast analyses allows the optimal control of a waste water treatment plant (WWTP) with regard to nutrient dosage and/or ...
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Seasons influence microbial response to climate changes
A warming climate and an increase in nitrogen to the soil from the atmosphere have demonstrated large effects on soil microbial activity and biomass. A new scientific study looks at these effects while taking into account seasonal variation. Their findings showed that warming and nitrogen increased microbial biomass, but the effects of nitrogen were only observed in the summer. This research ...
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Microplastics Found in Colorado Rain
If all the recent news about global plastics pollution hasn’t been alarming enough, scientist Greg Wetherbee of the United States Geological Survey (USGS) recently — and unexpectedly — found plastic in the rain while researching an unrelated question. Although the rain samples were collected at eight locations in the Rocky Mountains and on Colorado’s Front Range in the ...
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Enzymatic Nitrate Determination Now an ASTM Standard Method
NECi enzymatic method for nitrate determination is now an ASTM International Standard Method. This method is meant to replace methods D1254 (Nitrite) and D992 (Nitrate). Method D1254 uses a reagent which is considered to be a possible carcinogen. Method D992 is mentioned by ASTM to "have relatively large errors when used in wastewaters and also has greater manipulative difficulties" than the ...
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compEAct - A New Benchmark in TN and TS Analysis of Organic Sample Matrices
Analytik Jena AG (Germany) introduces an innovation in the field of combustion-based analyzers for the determination of Total Sulfur and Total Nitrogen in organic elemental analysis. The compEAct series offers compact, space-saving combustion systems for the fast and cost-effective analysis of liquids, gases and LPG samples. “compEAct is the ultimate solution when it comes to high ...
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compEAct – A new benchmark in TN and TS analysis of organic sample matrices
Analytik Jena AG (Germany) introduces an innovation in the field of combustion-based analyzers for the determination of Total Sulfur and Total Nitrogen in organic elemental analysis. The compEAct series offers compact, space-saving combustion systems for the fast and cost-effective analysis of liquids, gases and LPG samples. “compEAct is the ultimate solution when it comes to high ...
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ASTM E1915 - 11 Standard Test Methods for Analysis of Metal Bearing Ores and Related Materials for Carbon, Sulfur, and Acid-Base Characteristics
These test methods are primarily intended to test materials for compliance with compositional specifications and for monitoring. The determination of carbon and sulfur and acid neutralization potential in ores and related materials is necessary to classify ores for metallurgical processing and to classify waste materials from the mining and processing of ores such as leach ...
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ASTM A751 - 11 standard test methods, practices, and terminology for chemical analysis of steel products
1. Scope 1.1 These test methods, practices, and terminology cover definitions, reference methods, practices, and guides relating to the chemical analysis of steel, stainless steel, and related alloys. It includes both wet chemical and instrumental techniques. 1.2 Directions are provided for handling chemical requirements, product analyses, residual elements, and reference standards, and for the ...
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