Answer Posted / maduru balaram

Toluene is given minimum and maximum absorbance in nearest nanometer. Because use toluene.

in dissolution if one bowl got 70 percent 2nd bowl got 80 percent and 3rd bowl got 90 percent then how proceed?

754

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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.

2687

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Tell me about analytical method validation in QC

6181

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How we can identify process related and degradation impurity in single method with short period?

819

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what is third integration

1976

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how much mass should be there in volumetric flask while in preparation of sample for assay? 

2580

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Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

1917

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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?

3540

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Colorimtry

1660

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What is the use of tlc and hplc? And when and where use?

1165

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in sampling of raw material which side is pasted sampled labels

1838

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What is the difference between spectro meter and spectro photo meter?

11515

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Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

1858

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how can I make the copper get white bye any salt or acit?

2210

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How to calibration of the uv spectroscopy and its test?

1196

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