Sulphur Estimation in Soil by Turbidimetric method || скачать в хорошем качестве

Sulphur Estimation in Soil by Turbidimetric method ||

Sulphur in the soil is available as Soil solution and sulfate ions (SO42-) adsorbed on minerals. The quantity of soil solution sulfur is very less as compared to the adsorbed sulfate ions. Both calcium chloride (CaCl2) and Monocalcium phosphate (CaH4P2O8) are used for the extraction of Sulfate ions. But use of Ca2+ ions is more useful than Na+ and K+ ions, as the Ca2+ ions prevent deflocculation of soil and lead to easy extraction. Sometimes the sulfur content in soil is very less to detect. In such cases known quantity of seed solutions containing sulphur is added to the solution to bring the S quantity up to the detection level. The S content in soil solution is measured turbidimetrically using a spectrophotometer. The method was developed by Williams and Steimbergs (1969) and Chenin and Yein (1950). Reagents: 1. 0.15% calcium chloride solutions: Dissolve 1.5 g of CaCl2.2H2O in 1000 ml of distilled water. 2. Barium chloride crystals 3. 0.25% gum acacia: Dissolve 0.25 g of gum acacia in 100 ml of distilled water. 4. P standard solution: Dissolve 0.534g of K2 SO4 in 1000 ml of distilled water. Procedure: 1. Transfer 10g of air-dried soil in 150 ml of the conical flask. 2. Add 50 ml of 0.15% calcium chloride solution. 3. Shake for 30 minutes. 4. Filter with Whatman No. 1 filter paper. 5. Take 5/10 ml of extract in 25 ml of the conical flask. 6. Add 1g of barium chloride crystals. 7. Add 1 ml of gum acacia. 8. Shake with hands to dissolve the crystals. 9. Make up the volume to 25 ml and turbidity will develop in 5-30 minutes. 10. Measure the sulphur at 340 nm on a spectrophotometer. Calculation: mg/kg S in soil: R*50/10 * 25/5 Where R is the concentration of S in the sample. Timestamp: 00:00 Introduction 01:24 Principle of soil sulfur 03:42 Reagents required 05:34 Step by step procedure 08:58 calculation of sulfur 11:40 Outro =================================================please come on! My social media platforms par: ================================== 👉 Twitter:   / @amrit_rajalwal   👉 Youtube (iamrajalwal’s):    / @rajalwalacademy   👉 Youtube (rajalwals fitness series):    / @amritrajalwal   Instagram:   / iamrajalwal   If you liked the video Please Do Subscribe to My Channel 😉😉😉 Keep Supporting me so I can continue to provide you the information related to agriculture and the allied sector!! 😇🙏 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Thank you for Watching!