Which reagent can be recommended instead of disulfaphenol to determine the amount of nitrate in the soil?

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Abdelkader BOUAZIZ

Dear Otamurod Imomov, there are various alternative techniques with high accuracy. Please have a look at the following documents. My Regards

https://doi.org/10.2136/sssaj1981.03615995004500020024x

https://doi.org/10.1039/AN9679200311

https://link.springer.com/article/10.1007/s42452-020-3016-5

https://doi.org/10.1080/00103629009368334

Aref Wazwaz

Dear Otamurod Imomov . See the following useful links: https://dl.sciencesocieties.org/publications/sssaj/pdfs/45/2/SS0450020347

https://vlab.amrita.edu/?sub=2&brch=294&sim=1551&cnt=1

Kindly see also the following useful RG links: Article Determination of Available Nitrate, Phosphate and Sulfate in...

https://www.sciencedirect.com/topics/chemistry/griess-deamination

https://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052828.pdf

Also check please the following useful RG link: Article The use of the Orange I method for determining soil nitrates...

The following useful RG link is also very useful: Article Humic Acid-Oxidizing, Nitrate-Reducing Bacteria in Agricultural Soils

Visit also the following useful RG links: Article Spectrophotometric Determination of Nitrate in Vegetables Using Phenol

https://dl.sciencesocieties.org/publications/sssaj/pdfs/45/2/SS0450020347