Yeast Available Nitrogen (YAN) titration solution Reagent Code Description HI70456 sodium hydroxide solution (0.1 N), 1 L HI70457 sodium hydroxide solution (1 N), 1 L Volatile acidity titration solution Reagent Code Description HI70456 sodium hydroxide solution (0.1 N), 1 L HI70432 hydrogen peroxide solution (3%), 25 mL Titratable acidity titration solution Reagent Code Description HI70456 sodium hydroxide solution (0.1 N), 1 L Volatile acidity (VA) Acetic acid is commonly formed during yeast growth in the early stages of fermentation. The rate and amount of acetic acid formed is partially dependent on the pH, sugar levels, available nitrogen, and temperature of the system. Typical VA levels post-fermentation range from 0.2—0.4 g/L. Any level higher could indicate microbial involvement and potential spoilage. HI901W Automatic Titration System Solutions HI901W Automatic Titration System Accessories Code Description HI900100 dosing pump HI900150 50 mL burette assembly (includes syringe, aspiration, and dispensing tubes) HI900125 25 mL burette assembly (includes syringe, aspiration, and dispensing tubes) HI900110 10 mL burette assembly (includes syringe, aspiration, and dispensing tubes) HI900105 5 mL burette assembly (includes syringe, aspiration, and dispensing tubes) HI900250 50 mL burette syringe HI900225 25 mL burette syringe HI900210 10 mL burette syringe HI900205 5 mL burette syringe HI900260 3-way valve (includes 3 gaskets and 2 screws) HI900270S aspiration tube set with 316 stainless steel fitting (includes blue protection tube, gasket, and tube lock) HI900280S dispensing tube set with 316 stainless steel fitting (includes standard dispensing tip, blue protection tube, gasket, and tube lock) HI900301 overhead stirrer assembly (includes overhead stirrer and 3 propellers) HI900302 replacement propellers (3) HI900303 PVDF replacement propellers (3) for organic solvents HI900304 Replacement shearing type polycarbonate propeller (1) for HI901 and HI902 overhead stirrer HI900310 overhead electrode holder (includes overhead stirrer without electronics or propeller) HI900320 stirrer stand HI7662-T temperature probe HI900942 tool for burette cap removal HI900946 power adapter 120VAC to 24VDC HI900947 power adapter 220VAC to 24VDC HI920013 USB cable (HI902C only) HI900805 HI902C1/HI902C2 Design, Installation, Operation, and Performance Qualification (DQ/IQ/OQ/PQ) Documentation 4 Titration 4.55 www.hannainst.com |
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