Answer / s roy

Sampler, Injector, Column Compartment, Carrier gas and makeup gas flow, FID.

only one end point is possible for citric acid and we get 2 end points for di acid why?

3 Answers   Reddy Labs,

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I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

0 Answers  

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2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

0 Answers  

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What is cut off value of solvent used in hplc

1 Answers   Pfizer,

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How to do spike of aflatoxin in peanut to get maximum recovery

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Chromatographic Purity is a Qualitative analysis

2 Answers   Shasun Chemicals,

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What is a base line?

2 Answers  

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what type of compounds do we see lod @ wat type compounds do we see m.c

3 Answers   Orchid,

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why octanol used to determine the partition coefficient ?

0 Answers  

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How to establish pKa for a new API molecule ?

2 Answers   Neuland, Sun Pharma,

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why we are using hexane in calibration of number of drop per mL

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what is mean by covalidation

0 Answers  

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