J. Kjeldahl presents a new method for determining nitrogen content in organic substances, which he believes will be highly beneficial due to its ability to avoid the use of harmful hydrogen sulfide. The method involves heating the substance with concentrated sulfuric acid, followed by oxidation with potassium permanganate, and finally distilling the resulting ammonium sulfate solution. This method is claimed to be simple, rapid, and accurate, making it suitable for practical applications, especially in agriculture and physiology. Kjeldahl highlights the advantages of the method, including its ease of use, reduced need for specialized skills, and minimal equipment requirements. He also discusses the limitations of the method, particularly for certain alkaloids where nitrogen is bound in a more stable form. The article includes a comparison of the new method with other established methods and provides detailed experimental results for various organic substances. Kjeldahl concludes by expressing his hope that the new method will be widely adopted by chemists.J. Kjeldahl presents a new method for determining nitrogen content in organic substances, which he believes will be highly beneficial due to its ability to avoid the use of harmful hydrogen sulfide. The method involves heating the substance with concentrated sulfuric acid, followed by oxidation with potassium permanganate, and finally distilling the resulting ammonium sulfate solution. This method is claimed to be simple, rapid, and accurate, making it suitable for practical applications, especially in agriculture and physiology. Kjeldahl highlights the advantages of the method, including its ease of use, reduced need for specialized skills, and minimal equipment requirements. He also discusses the limitations of the method, particularly for certain alkaloids where nitrogen is bound in a more stable form. The article includes a comparison of the new method with other established methods and provides detailed experimental results for various organic substances. Kjeldahl concludes by expressing his hope that the new method will be widely adopted by chemists.