Deciphering LaMotte’s Ammonia Nitrogen Test Kits: A Comprehensive Guide to Water Analysis

9, Mar 2024


In the realm of water quality assessment, the determination of ammonia nitrogen plays a crucial role. LaMotte, a renowned provider of water testing solutions, offers a range of test kits designed specifically for this purpose. Understanding the nuances of these kits is essential for accurate analysis and informed decision-making. Let’s delve into the intricacies of LaMotte’s ammonia nitrogen test kits, exploring the methodologies, options, and applications they entail.

Understanding Colorimetric Tests:

Colorimetric tests serve as the cornerstone of ammonia nitrogen analysis, operating on the principles of Beer’s Law. This fundamental law states that the concentration of a substance correlates directly with the amount of light absorbed by the sample, resulting in the development of a characteristic color. LaMotte offers two primary colorimetric methods for ammonia nitrogen analysis: the Nessler method and the Salicylate method.

Nessler Method:

The Nessler method relies on Nessler’s reagent, which reacts with ammonia to produce a distinct yellow to brown coloration. This method is well-suited for freshwater analysis, providing reliable results with excellent sensitivity.

Salicylate Method:

In contrast, the Salicylate method utilizes a reaction with salicylate to generate a blue coloration. When combined with the inherent yellow reagent color, this method produces hues ranging from yellow to blue. Notably, the Salicylate method is preferred for saltwater analysis due to its compatibility and lack of mercury salts, ensuring environmentally friendly testing practices.

Exploring Test Method Options:

LaMotte’s commitment to versatility extends beyond the choice of colorimetric method to encompass various test method options, each catering to distinct preferences and requirements.

Octa-Slide 2 Comparator:

The Octa-Slide 2 Comparator offers a streamlined approach to comparison testing. Featuring a color bar adjacent to the reacted sample test tube, this comparator allows for the simultaneous viewing and comparison of eight color standards. This efficient design enhances workflow and facilitates rapid decision-making, making it an ideal choice for high-throughput testing scenarios.

Colour Chart Comparator:

For those preferring a more traditional approach, LaMotte provides the Colour Chart Comparator. This method utilizes laminated color standards, against which the reacted sample is held for comparison. With its straightforward yet effective design, the Colour Chart Comparator offers simplicity and ease of use, making it accessible to users across various proficiency levels.

Choosing the Right Kit:

When selecting a LaMotte ammonia nitrogen test kit, several factors come into play. Consider the specific requirements of your water analysis project, including the type of water being tested (freshwater vs. saltwater), the desired level of sensitivity, and the preferred testing methodology. By aligning these factors with the available options, you can make an informed decision that ensures accurate and reliable results.


In conclusion, LaMotte’s ammonia nitrogen test kits represent a pinnacle of precision and versatility in water analysis. Whether utilizing the Nessler method for freshwater analysis or the Salicylate method for saltwater applications, these kits deliver consistent and reliable results. With options such as the Octa-Slide 2 Comparator and the Colour Chart Comparator, users can tailor their testing approach to suit their preferences and requirements. By understanding the nuances of these kits and selecting the right one for your needs, you can embark on water quality assessment with confidence and accuracy.