Apparatus and Supplies
Burets, continued
Buret, Acrylic, with PTFE Plug, Nalgene®
Clear acrylic plastic. Leakproof stopcock, self-lubricating with PTFE plug. Not affected by dilute acids and bases. Do not use with concen- trated ammonium hydroxide or organic solvents.
See free video at flinnsci.com.
1-800-452-1261
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50
                    Catalog No.
  Description
  Size
   Price/Each
   Price/Case of 4
   AP1231
Buret, Acrylic, with PTFE Plug, Nalgene®
   25 mL
 $128.15
 $461.32
 AP1232
 50 mL
  144.90
  521.64
 AP1233
  100 mL
   158.35
   570.04
 Buret, Acrylic, with PTFE Plug, Nalgene® AP1231, etc.
   Before plac-
ing liquid in a buret, make sure the stopcock is assembled properly and
in the “Off” position.
White paper under flask makes a subtle color change more visible.
Dispense buret contents dropwise when nearing the endpoint.
Gently swirl the flask while titrating.
Use a Buret
  Proper technique for manipulating a buret stopcock:
Wrap thumb and forefinger around handle to turn stopcock. If you are right-handed, use your left hand.
    During a titration, rinse the walls of the flask several times using a wash bottle.
See free video at flinnsci.com.
     Clean a Buret Tip
Stopcock grease often hardens, breaks off and falls into the tip of the buret, clogging it up. There are two methods used to unclog them:
• Insert a fine wire into the buret tip, breaking up the plug. Be
careful—glass tips are especially fragile.
• Fill buret halfway with water—turn open stop- cock while heating tip with matches. The grease will melt and the water/air
pressure will push it out. This
may require several matches.
   DLAB dTriteTM Digital Buret
dTriteTM Digital Buret is an electronic device that delivers accurate, precise and convenient bottle-top titration, while reducing the risk of accidental chemical contact and operator fatigue. Ideal for analytical chemistry, food industry and water analysis. Bottles sold separately.
Features include:
• Built-in magnetic stirrer with support platform
• High-quality motor
• Electronic control to decreases repetitive strain injury and fatigue
• Remote control panel allows for external control of buret and
stirrer operation without manual disturbance from user
DLAB dTriteTM Digital Buret AP9540
  Catalog No.
  Description
  Range (mL)
   Price/Each
   AP9540
 DLAB dTriteTM Digital Buret
   0.01–99.9
  $837.50
 BURETS continued on next page.