Laboratory Products

  • New ASTM Method Simplifies Determination of Kjeldahl Nitrogen

New ASTM Method Simplifies Determination of Kjeldahl Nitrogen

Oct 09 2017 Read 549 Times

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 the digestion mixture to release the ammonia. The new ASTM D8001 offers an alternative applying persulfate digestion followed by ion chromatographic separation and conductivity detection with sequential suppression.

The new method is described by Metrohm Application Noe S-358 which can be downloaded free of charge.

Read comments0

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Digital Edition

LabAsia Buyers Guide 2018

October 2018

In This Edition Articles - Choosing the Optimum Plasma Spectrochemistry Technique for Measuring Elemental Impurities in Pharmaceuticals - Blue Jacaranda Seed Oil Analysed Using Comprehensive...

View all digital editions



Oct 23 2018 Frankfurt am Main, Germany


Oct 29 2018 Moscow, Russia

Lab Innovations 2018

Oct 31 2018 Birmingham, UK

analytica China

Oct 31 2018 Shanghai, China

Lab Expo Tunisia

Oct 31 2018 Tunis, Tunisia

View all events