OPTIMIZE YOUR CARBON AND NITROGEN ANALYSES IN LIQUID SAMPLES WITH TAILORED METHODS

17/06/2024

Carbon, TOC, nitrogen, and protein determination in liquid samples can be very easy and convenient: discover how to perform automatic, accurate, and fast analysis on liquid samples just as easily as with solid samples.

Accurately determining the total carbon (TC), total organic carbon (TOC), total nitrogen (TN), and protein content in liquid samples is crucial for both environmental science and the food & beverage industry.

Liquid samples often present unique challenges, such as handling issues and potential preparation errors, which can compromise final results. Additionally, achieving high repeatability for element detection can be particularly demanding with liquid samples.

To overcome these challenges, VELP offers dedicated accessories and kits for precise and accurate automatic analysis of liquid samples:

Method 1: the use of tin foils and super-absorbent powder
Method 2: with tin capsules and discs for capsules
Method 3: direct injection with a syringe

Method 1: Tin foils and super-absorbent powder

Simple and effective
When preparing a liquid sample for the analysis, an absorbent powder can be used to change the status of the sample from watery to pasty. The first method indeed employs the VELP super-absorbent powder to soak up the liquid and solidify the sample for easy encapsulation within a tin foil.

How it works
Dose the liquid sample into the super-absorbent powder, wrap the tin foil, and place it into the electronic autosampler.

Benefits
Quick preparation, minimal handling errors, no loss of material during the analysis, and reliable results.

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Method 2: Tin capsules and a dedicated disc for autosampler

High-throughput analysis
For laboratories handling larger volumes of liquid samples VELP offers tin capsules with dedicated discs for capsules. You can seamlessly integrate liquid samples analysis into the autosampler workflow, alongside solid samples.

How it works
Pipette the liquid sample into a tin capsule and place it onto the dedicated disc for the autosampler.

Benefits
Enhanced throughput and streamlined processes.

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Method 3: Syringe direct injection

Exceptional sensitivity
For analyses requiring higher sensitivity compared to the previous methods, direct injection is the method of choice. Our manual dosing kit allows you to inject up to 1 ml of liquid sample directly into the combustion area, bypassing traditional encapsulation.

How it works
A syringe is used to inject the liquid sample directly into the combustion area.

Benefits
Achieve high sensitivity in the ppm range, which is ideal for analyzing samples with low concentration levels of carbon and nitrogen.

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Versatile Solutions for your Elemental Analysis

The VELP CN 802 Carbon/Nitrogen Analyzer and the NDA 702 Dumas Nitrogen Analyzer are designed to handle a wide range of sample types with precision and ease. Whether you're analyzing solids, semi-solids, or liquids, our elemental analyzers deliver reliable, accurate, and high-quality results.

Contact us to now more about our products and receive a free consultation on how to elevate your analytical capabilities in elemental analysis.