If you use absorbance to find the amount of one substance that a sample contains, and do three determinations, should you just average the three values and use that? Or just talk about them individually?

  • $\begingroup$ Usually, I would average the values. That is, unless one is much off. Then, I would repeat the measurements and ask myself what went wrong. Is the compound air-sensitive? Is one of the cuvettes contaminated inside? Did I clean the outside of the cuvette properly? $\endgroup$ – Klaus-Dieter Warzecha Mar 11 '16 at 8:10
  • $\begingroup$ Alright. That's what I thought, but always best to be sure. Thanks! $\endgroup$ – cryo67 Mar 11 '16 at 8:23
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    $\begingroup$ My pleasure! Btw, welcome to Chemistry.SE! If you don't mind the hint, I suggest that you turn your unregistered, cookie-based account into a registered, login-based account. Less hassle, more fun. Have a look at Why register for details. $\endgroup$ – Klaus-Dieter Warzecha Mar 11 '16 at 8:33

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