passages.id: split_6_test_2447_passage
passages.type: progene_text
passages.text: Spectrophotometric method was used for study the binding of bromthymol blue dye ( BTB ) with bovine methemoglobin in 15 % solutions of ethanol , glycerol and polyethylene glycol with molecular mass of 1.5 kDa ( PEG-1500 ) .