Explain what is a base line?
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Answer / praveen kumar
The chromatogram recording the detector response when only the mobile phase emerges from the column
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How to know the estimated LOQ concentration in ppm
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In HPLC Chromatographic separation Resolution equation is Rs = 1.18 (tR2 –tR1)/wh1+Wh2, Where, tR2 and tR1 is run time of eluent ratios of the distances from the point of application to the centers of the spots and the distance travelled by the solvent front from the point of application (retardation factor), and Wh1and Wh2 , is peak width of at half height. What is 1.18 ?
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Organic Chemistry 
