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  1. 1 Oceanological Studies

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  1. 1 2000

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  1. 1 Grzybowski W.

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On some factors influencing accuracy and precision of Baltic water absorbance measurements

100%
Grzybowski W.
Oceanological Studies
|
2000
|
vol. 29
|
issue 4
5-13
EN
Various factors influencing the quality of UVVIS spectra obtained for sea water (in 100 mm cells) have been tested. The spectrophometer instability and baseline drift introduced absorbance error of ~ 0.0002 and ~ 0.001, respectively. Deviations caused by improper blanks reached 0.005 ab-sorbance units. Standard deviation of absorbance values determined for samples collected in the Gulf of Gdansk during repetitive casts (0.008-0.022) significantly exceeded the detection limit based on variability of the blank sample (0.002).
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