Why we should calibrate pH meter with buffer solutions (4.0, 7.0 and 9.2). Is there any specific reason other than checking pH meter working ?

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Nano technology related questions?

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02 May 2021 911 10 View

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Need details about it

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Research problem purpose

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What is the composition of Nano Zn, Nano P and Biophos (Any article about these 3 Nano fertilizers and especially these 3 as foliar spray)?

Need some confirmation and any source PDF

28 December 2020 5,978 0 View

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Example - pH of the soil is 9.0

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Explain Exclusion What it Do ?

21 June 2020 1,130 10 View

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J. C. Tarafdar

@ Eetela, buffer solution is needed for calibration of pH meter as they resist the changes in pH if you accidentally add a little acid or base or even water and stable for longer period. It also maintain a relatively constant pH in a solution as well as constant internal environment.

Koushik Mondal

pH=4 for acidic, 7 for neutral and 9.2 for basic regions. These are all standard and well-known buffer solutions.