Fertilizers:

 1- Moisture determination:

·                 Oven method

·                 Vacuum desiccators method

 2- Chloride determination:

·                 Mohr method

·                 Volhard method (Ammonium Thiocyanide)

3- Nitrogen measurement:

·                 Nitrates

·                 Total Nitrogen

·                 total nitrogen in nitrate free samples

·                 total nitrogen in Nitrite contained samples

·                 total nitrogen in samples with high Chloride

·                 Ammonia form nitrogen by distillation

·                 insoluble Nitrogen  in water

·                 Nitrogen in Urea

·                 bio Urea by spectrophotometer

4- Determination of Phosphor

·                 Quinoline Molibdate method

·                 Total Phosphorous by  Quinoline Molibdate

·                 Total Phosphorous by photometric method  

·                 Soluble Phosphorous

·                 Soluble Phosphorous by Photometric method

·                 Insoluble Phosphate in citrate

·                 Soluble Phosphate in citrate

·                 Soluble Phosphorous in citric acid

·                 Free Phosphoric acid

·                  

 5- Determination of sodium & potassium by flame photometer:

·                       In Sulphate contained fertilizers

·                       In free Sulphate fertilizers

6- Measurement of soluble micro elements in water by AAS method

7- Soluble Bohr in water

8- Insoluble materials in acids

9- TSS

10- pH

11- Free acid content (based on H₂SO₄ )