Page 176 - Demo

Apparatus and Supplies
pH Meters, continued
Advanced pH Meter Kit, Benchtop, Orion StarTM
Orion StarTM pH meter, highly respected in research and industry, in a model specifically designed for use in a busy laboratory!
Features and Specifications:
• Large LCD displays pH or mV reading and temperature
• Splash­proof exterior and wall­mountable
• Automatic or manual pH calibration
• Three­point calibration with auto­buffer recognition • Range: ­2.00 to 16.00 pH, ­5–105 oC
• Resolution: 0.1, 0.01 pH; 0.1 oC
• Accuracy: ±0.01 pH; ±0.1 oC
• Storage memory for 50 data points
Instrument comes complete with pH meter, combination pH/tempera­ ture ATC refillable electrode, electrode arm and holder, universal power adapter, and solution kit containing 60 mL each of electrode storage, refill, and cleaning solutions and pH 4, 7, and 10 buffers. Includes instructions and CD with detailed manual and trouble­shooting guide. Accepts any pH probe with a standard BNC connector. Also able to operate on 4 AA batteries, available separately. 3­year warranty.
pH Meter Accessories
Buffer Set for pH Meter Calibration
Pre­weighed amounts of buffer powders at three pH values—pH 4.0, 7.0 and 10.0. A correctly calibrated pH meter will check at all three points. These buffer powders are stable and have an excellent shelf life. Dissolve the powder in distilled or deionized water and use. The buffer preservative provided acts as a mold inhibitor and also colors each solu­ tion as follows: pH 4.0—red­orange; pH 7.0—green; pH 10.0—blue.
Each capsule makes 100 mL of solution. Each vial contains ten capsules or enough to make, in total, one liter of buffer solution for each of three pH ranges.
Electrode Rack
An acrylic, eight­place rack for storing your elec­
trodes inside test tubes which contain buffer solutions
or other storage solutions. Storing your electrodes in a storage solution will prepare them for immediate use or stabilize them if they are used infrequently. 9" long x 3" deep x 31⁄4" high.
Electrode Swing Arm
Prevents electrode breakage by aiding in raising and lowering of elec­ trodes into samples. Easily adjusted to suit your needs. Very stable. Truly a necessity.
pH METERS ACCESSORIES continued on next page.
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Advanced pH Meter Kit, Benchtop, Orion StarTM AP7633
Buffer Set for pH Meter Calibration AP1300
Catalog No.
Description
Price/Each
AP7633
Advanced pH Meter Kit, Benchtop, Orion StarTM
$910.70
Catalog No.
Description
Price/Each
AP1300
Buffer Set for pH Meter Calibration
$29.85
Electrode Rack AP7526
Looking for Buffer Solutions or Capsules?
See flinnsci.com.
Catalog No.
Description
Price/Each
AP7526
Electrode Rack
$52.85
Electrode Swing Arm AP8692
Catalog No.
Description
Price/Each
AP8692
Electrode Swing Arm
$111.35
Properly Store and Maintain pH Electrodes
• Most slow, unresponsive pH meters can be rejuvenated by simply soaking the electrode bulb in a saturated solution of KCl for 30 minutes.
• Gel­filled combination electrodes should be stored in a pH 4 buffer solution with a few drops of saturated potassium chloride. This slightly acidic solu­ tion allows the electrode to respond faster. Do not use distilled or deionized water; the low ionic strength extracts ions from the electrode bulb, causing a slower response. Tap water may be used for short term storage.
• Use and store electrodes in a vertical position.
• Between samples, rinse electrodes with distilled or deionized water.
• Never wipe the end of an electrode. Dry it by blotting with a lint­free paper like Kimwipes®.
• To prevent breakage during use, always use an electrode swing arm or holder to assist in raising and lowering the electrode into solutions.
• An electrode rack will help prevent electrode breakage during storage. See free video at flinnsci.com.