VELP Elemental & Nitrogen Analyzers: EMA 402XL, EMA 502, CN 802 & NDA 702
VELP Scientifica offers a high-performance portfolio of elemental analyzers designed to meet the requirements of modern analytical laboratories. Whether you need CHNS-O composition or nitrogen and protein determination, the EMA 402XL, EMA 502, CN 802, and NDA 702 deliver exceptional speed, accuracy, and reliability.
With features such as automated workflows, robust software, and compliance with international reference methods, VELP elemental analyzers support fast, precise, and efficient elemental analysis across a wide range of applications.
EMA 402XL — Macro CHNS Elemental Analyzer for Larger Samples
The EMA 402XL Macro Elemental Analyzer CHNS accurately determines carbon, hydrogen, nitrogen and sulfur, especially in larger or heterogeneous samples. It suits sectors such as environmental, agronomy, fuels and energy, waste and materials.
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EMA 502 — All-in-One CHNS/O Elemental Analyzer
The EMA 502 CHNS-O is a comprehensive solution for the determination of carbon, hydrogen, nitrogen, sulfur, and oxygen.
It is designed for high accuracy and reliability in industries including pharmaceuticals and life sciences, organic chemistry, petrochemistry and energy, environmental analysis, agronomy, and food & feed.
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CN 802 — Fast and Simultaneous Carbon & Nitrogen Analysis
The CN 802 is a robust and flexible combustion analyzer operating according to official reference methods.
It enables the simultaneous determination of carbon and nitrogen in sectors such as agriculture, environmental analysis, food & feed, and chemical industry.
NDA 702 — Maximum Productivity for Nitrogen & Protein Analysis
The NDA 702 Dumas elemental analyzer delivers nitrogen and protein results in just 3–4 minutes.
It is ideally suited for high-throughput laboratories requiring a fast, safe system with the flexibility to use helium or argon as carrier gas.
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Fast, simultaneous carbon and nitrogen analyses
The CN 802 is a robust, flexible combustion analyzer that follows official reference methods to determine carbon and nitrogen across many sectors: agriculture, environmental, food & feed and chemical.
The proprietary CNSoft™ software powers the CN 802 and delivers unsupervised, simultaneous results in 5 minutes for:
- TC: Total Carbon
- TOC, TIC: Total Organic and Inorganic Carbon (after acidification)
- TN: Total Nitrogen
- C/N Ratio
The CN 802 is a safe analyzer with no aggressive chemicals or time-consuming steps: just prepare your sample and walk away.
Set your next analysis and get a wealth of information from the sample.
CN 802 Working Process
The sample is purged with a carrier gas and drops into the combustion reactor, where it is converted into elemental compounds at high temperature (above 1000 °C).
Water is separated in two steps. The combustion gases first reach the maintenance-free physical trap DriStep™ (WT1) after combustion, trapping 99% of the water; a chemical trap (WT2) then removes the remaining 1%.
High temperature combined with the exclusive Vcopper™ reduces nitrogen dioxide to molecular nitrogen in the reduction furnace.
The VELP HighSensIR detector covers a very wide carbon range, from a few ppm up to 150 mg of absolute carbon — from micro to macro applications.
Auto-regenerating CO2 absorbers then trap carbon dioxide, letting the exclusive TCD (Thermal Conductivity Detector) measure the nitrogen content.
The all-in-one CHNS/O solution to broaden your analytical potential
The EMA 502 CHNS-O Elemental Analyzer accurately and reliably determines carbon, hydrogen, nitrogen, sulfur and oxygen across sectors: pharma and life science, organic chemistry, petrochemistry and energy, environmental, agronomy and food & feed.
The EMA 502 (ref. VEL-F30800100) elemental analyzer for carbon, hydrogen, nitrogen and sulfur — with an oxygen option — includes:
Start-up kit, cables for balance and PC, software, 30-position disc autosampler, kit for approx. 1000 analyses, argon option, 1-year ERMES license
CHNS-O analysis with the EMA 502 helps determine the structure of an unknown compound and assess the structure and purity of a synthesized one.
Following official reference methods, the EMA 502 performs CHNS and oxygen determination in minutes, with no add-ons or external modules.
The EMA 502 is a safe analyzer with no aggressive chemicals or time-consuming steps.
Set your next analysis and get a wealth of information from the sample.
EMA 502 Elemental Analyzer working principle
CHNS analysis begins with combustion of the sample in the VELP combustion furnace, above 1000 °C, to obtain elemental compounds.
VELP Vcopper™, a highly active copper powder, sits in the lower reactor to help reduce NOx to N2.
The flow then reaches the gas chromatography column oven, whose homogeneous, adjustable temperature fully separates the elements for final detection by TCD.
For oxygen analysis, the sample undergoes pyrolysis in the furnace, then passes through a chemical trap that absorbs all impurities before reaching the gas chromatography column and the TCD for detection.
Built to maximize your productivity
The NDA 702 Dumas elemental analyzer suits high-throughput labs that need a fast, safe analyzer, with a choice of helium or argon as carrier gas.
Powered by DUMASoft™ software, the NDA 702 produces N/protein results in just 3 to 4 minutes, fully unsupervised and cloud-enabled.
The NDA 702 is much faster, easier and safer than a traditional Kjeldahl system.
It is a safe analyzer that needs no aggressive chemicals or time-consuming steps: just prepare your sample and walk away.
NDA 702 Nitrogen Analyzer Working Principle
The Dumas method begins with combustion of the sample in the VELP combustion furnace (CF), above 1000 °C, to obtain elemental compounds.
Water is separated in two steps: first the maintenance-free physical trap DriStep™ (WT1) placed right after combustion, then a chemical trap (WT2) that removes the remaining 1% of water.
Between the two traps, the gas flow passes through the reduction furnace (RF), where NOx compounds are converted into molecular nitrogen (N2).
The CO2 is then trapped by the self-regenerating VELP CO2 adsorbers.
Finally, elemental nitrogen is detected by the TCD LoGas™ thermal conductivity detector, which sends the data to DUMASoft™ to calculate nitrogen and protein content.
Elemental Analysis and the Dumas Method
The Dumas method (combustion method) is a primary method for determining nitrogen and protein, offering fast results, ease of use and safety. It is considered an alternative to the classical Kjeldahl method. Both are validated by international bodies: Kjeldahl is recognized by AOAC, EPA, DIN, ISO and others, and Dumas by AOAC, AACC, ISO, DIN, ASBC, AOCS, OIV and others. In some countries, local guidelines recommend one method over the other.
The Dumas method for nitrogen determination (1831) is older than Kjeldahl (1883) but more convenient in many ways: speed, safety, cleanliness, productivity and cost per analysis.
In the past, the conditions the Dumas method requires were hard to reproduce, so Kjeldahl took the lead and became the classical method for nitrogen/protein determination.
Today, thanks to technological progress, Dumas nitrogen determination is becoming more widespread.
