Answer Posted / ashok maduri

Always keep your pH electrode moist. We recommend that you store your electrode in storage solution. If
storage solution is not available, use either a pH 4 or 7 buffer solution. DO NOT store electrode in
distilled or deionized water this will cause ions to leach out of the glass bulb and render your electrode
useless.
After storage, you may notice white KCl crystals forming outside your electrode. This will not interfere
with measurements. Simply rinse the electrode and blot dry before use.

in gas chromatography what is the difference between gas flow rate and average linear velocity ?

2650

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What is diffrence between extractable volume and deliverable volume? Answer pls

4612

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in which situation require to change rs specification?

794

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Why Ethanol is Used for Standardization of GC Head space?

4264

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if rsd failed then what require to do?

876

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In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

2014

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Qc interview questions

1789

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Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

2784

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What is aggregate and fragments in SEC?

2155

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how you start the solubility study?

857

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Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

1500

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how you confirm the assay method?

823

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How to choose the which salt is suitable for mobilephase

3300

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what is the origin to prepare standard operating procedure

2401

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What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

2751

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