The measurement results from use of the biosensor were
compared with those from the standard Monier–Williams
method [6,36], but with sulfur levels determined by ICP–AES
rather than GC. To 300mLof the same beer used for the channel
biosensor was added 90mL of 4Mhydrochloric acid and
10mL of Milli-Q water were then added to a round bottomed
flask.