Instrument: Spectrophotometer

Dataset: 
Series 4: Aggregation of Thalassiosira weissflogii as a function of pCO2, temperature and bacteria: Aggregation Phase - Sinking Velocity
Instrument: 
Spectrophotometer
Instrument Short Name: Spectrophotometer
Community Standard Description
(http://vocab.nerc.ac.uk/collection/L05/current/LAB20/)
Instrument Description:

An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples.

PI supplied instrument name: spectrophotometer
Dataset-specific description

The pH (total scale) was measured with a spectrophotometer using the indicator dye m-cresol purple
(Sigma-Aldrich) within 1-2 hours of sampling at 25 oC (Clayton and Byrne 1993).