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The “cod” image will flash for three seconds, then the sample test consequence will surface inside the display as part for every million COD. History the test final result.
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Introduction and basic principle of glc, hplc columns of hplc columns of glc detectors of glc detectors of hplc chromatography classification of chromatography gas liquid chromatography high performance liquid chromatographyIntroduction and principle of glc, hplc
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b The acetylation reaction [1] is carried out in pyridine to prevent the hydrolysis of acetic by drinking water. Once the acetylation reaction is finish, drinking water is included to covert any unreacted acetic anhydride to acetic acid [2].
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