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Product Maintenance Guides

Caring for your Ceramicware

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For General Cleaning, use weak to moderate concentration acids (except hydrofluoric) or alkalis. Also acceptable are detergents, abrasives, and standard soap. Burning off organic residue by gas burner or furnace is also acceptable.

For porous ceramic, use weak to moderate concentration acids (except hydrofluoric) or alkalis. Back flushing is also a method commonly used to unclog pores. For surface deposits, light sanding may be acceptable.

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Caring for your Glassware

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General Cleaning

Good Laboratory Technique demands clean glassware, because the most carefully executed piece of work may give an erroneous result if dirty glassware is used. In all instances, glassware must be physically clean; it must be chemically clean; and in many cases, it must be bacteriologically clean or sterile.

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Removing RNase or DNase from Plastic Containers

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  1. RNase, an enzyme that breaks down RNA, and DNase, which breaks down DNA, are contaminants that can interfere with nucleotide research. DNase can be destroyed by autoclaving for 15 minutes at 121°C (250°F) or by following any of the procedures listed below. One or more of the following techniques will inhibit or remove RNase from your plastic container. Match the resin code on the bottom of your Nalgene® container with the correct technique.

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Caring for your Stainless Steelware

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Use the Proper Tools. When cleaning your stainless steel products, take care to use non-abrasive tools. Soft cloths and plastic scouring pads will not harm the steel’s passive layer. Stainless steel pads can also be used but the scrubbing motion must be in the direction of the manufacturer’s polishing marks.

Clean with the Polish Lines. Some stainless steels come with visible polishing lines or “grain.” When visible lines are present, you should always scrub in a motion that is parallel to them. When the grain cannot be seen, use a soft cloth or plastic scouring pad.

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Glass Thermometer Maintenance

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Care of Glass Thermometers

Treat glass thermometers with proper care. Never tap against hard surfaces—small fractures may result, affecting accuracy. Do not subject a glass thermometer to extreme temperature changes—the thermometer may break or the liquid column may separate.

Reuniting Separated Liquid Columns

Thermometer liquid columns can become separated during shipment. This means that some gas has gotten below the top of the mercury or spirit liquid-fill. Inspect thermometers for bubbles in bulb or liquid separation before using. For reunification methods, see "Methods for Reuniting Separated Columns" link below.

How to Read a Hydrometer

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  1. Pour your sample into a smooth, clear cylinder or jar that is dry or well rinsed with a portion of the sample.
  2. Make sure your sample is thoroughly mixed before testing.
  3. Immerse the hydrometer in the liquid to a point slightly below the place where it naturally floats. Make sure the hydrometer and liquid are at rest and free of air bubbles.
  4. Measure the temperature of the sample. Ideally, the sample temperature should be equal to the temperature standard of the hydrometer, generally 60°F. If temperature differences are unavoidable, correction tables can help to adjust readings—call our Applications Specialists for information.
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Ultrasonic Cleaner Maintenance

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Ultrasonic cleaning is a process that begins when high-frequency sound waves are emitted. The waves become alternating high- and low-pressure waves inside the cleaner's chamber that create tiny bubbles or cavities that eventually burst. The bursting action provides gentle scrubbing known as cavitation. During cavitation, soiled surfaces are cleaned as they come in contact with the bubbles.

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Safely Testing PVC and CPVC Pipe Systems

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You've just installed a new PVC or CPVC plastic pipe and fittings system. The cement joints have been adequately cured and you are ready to test and inspect the system for leaks.

Air Testing Can be Dangerous

The most common test method is to use water under moderate pressure. However, installers sometimes opt for testing with air pressure because it is quicker and easier. But air testing, if done improperly, can be hazardous.

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Optimizing your Ultrasonic Cleaner

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Ultrasonic cleaners have been workhorses in both laboratories and industry for decades. This acceptance is based on their ability to remove soils from inaccessible areas quickly, completely, and consistently without reliance on operator technique. Tabletop cleaners offer a number of features which allow the operator to optimize their performance.

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Caring for your Plasticware

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Caring for your Plasticware5.00 out of 50 based on 2 voters.


 

Washing Plastics with a Mild Detergent is sufficient for most general applications. Be sure to rinse with tap water, and then rinse again with distilled water. Most plastics, particularly the polyolefins (PPCO, PP, PMP, LDPE, and HDPE), have nonwetting surfaces that resist attack and are easy to clean. Do not use abrasive cleaners or scouring pads on any plastic labware. Do not use strong alkaline cleaning agents with polycarbonate (PC).

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