Question/Answer

What digestion method/procedure is recommended for digesting Ghost Wipes? Is a simple nitric acid digestion adequate or should aqua regia be used?

Please visit our Product Manual Download page and download the file ‘HotBlock Manual 08.2016.pdf’. In it you will find a procedure that outlines the digestion of GhostWipes.

What is the ghost wipe made of and moistened with? Is it safe for a nursing mother to handle the wipe itself? Are the wipes themselves non toxic?

GhostWipes are made of polyvinyl alcohol and are moistened with Deionized Water. They are non-toxic and safe for everyone to handle prior to sampling.

Can ghost wipes be used after the expire date if still wet?

The expiration date is the date up to which we certify that the GhostWipe will retain its wetness in its packaging. The wipes may retain their wetness past this date depending upon storage conditions and other factors. You can use them past the expiration date as long as they are still wet and if you don’t have to worry about an auditor citing you for using them.

Are expired wipes still good to use?

The expiration date is the date up to which we certify that the GhostWipe will retain its wetness in its packaging. The wipes may retain their wetness past this date depending upon storage conditions and other factors. You can use them past the expiration date as long as they are still wet and if you don’t have to worry about an auditor citing you for using them.

Why do Ghost Wipes have an expiration date?

The expiration date is the date up to which we certify that the GhostWipe will retain its wetness in its packagaing.

Can ghost wipes be used for PCB analysis?

The GhostWipes are made of a polyvinyl alcohol. Therefore, when digested and analyzed, you will see isopropanol and related alcohol peaks. As long as your Aroclor/PCB does not elute around the same time as the alcohols, then you should be good. You can always run a blank GhostWipe and see its contribution to your chromatograph.

How much DI water do you use per wipe? (for dilution calculation)

Each wipe contains between 3.2-3.5 grams of DI water.

How much does a 15 cm x 15 cm ghost wipe weigh?

The GhostWipes come premoistened with DI water in their packaging. Out of the packet a GhostWipe typically has a mass of 4.5-5.0 g. A dry GhostWipe will be 3.5-4.0 g.

Can Ghost Wipes be used to sample a wall for asbestos?

The GhostWipe is not compatible with the current methods of counting fibers to detect asbestos. The wipe has its own fiber contribution and has not been evaluated in conjunction with the procedure for asbestos analysis.

can ghost wipes be stored in area where temperatures fall below freezing

We do not have any specific storage requirements for the GhostWipe. Make sure that the wipe comes back to above freezing before use. This will ensure that the DI water packaged in the wipe will properly moisten the material to pick up the intended particulate material.

What are effective solutions and methods for disolving ghost wipes?

The GhostWipe was designed to be used with ASTM E1792. This method calls for a heated acid digestion. NIOSH method 7082 is also used in digesting wipe samples. This method also uses a heated acid digestion. An adaptation of this method can be found in the HotBlock manual.

What is the country of origin of the ghost wipes? I need to know because we are working in Canada and customs requires this information. Thank you.

The GhostWipe originates in the USA.

Do ghost wipes meet ASTM D7707 specifications?

The Beryllium GhostWipe, SC4250BE, meets the specifications set forth in D7707.

how much does a GhostWipe weigh?

One dry Ghostwipe has a mass of 1.0-1.1 g.

Are the Ghost Whipes made in the USA?

Yes, the GhostWipes are made in the USA.

Can i use ghost wipes to clean my furniture as regular cleaning wipes?

Depending on the desired results these wipes may be of limited use in cleaning purposes. The wipe is moistened with DI water to facilitate the collection of loose particles on surfaces. It could potentially leave behind water marks on wood and does not have any special cleaning properties.

Can the ghostwipe be used to test a sulfuric acid tank for metals and cyanide?

The GhostWipe is designed to be used for dust sampling on surfaces for lead and beryllium. We do not test the wipe for the presence of any other contaminants. Some users have reported success in using the wipe for other metals. To do so, you would need to check each lot of wipes for background levels of your analytes of interest. Take as many wipes as you need for a good statistical evaluation (a minimum of 5-7 is recommended) and analyze them individually as blanks. Average the results of the contaminants that you have an interest in and use that as a background correction for future analyses with that lot. I do not know if cyanide will be adequately captured using the wipe procedure. The tank wall conditions will also affect the stability of the wipes. Depending on the amount and strength of acidic residue left on the inside of the tank you may experience some degradation of the wipe.

do the ghost wipes have an expiration date? SC4250

The GhostWipes have an expiration date of 2.5 years (30 months) from the date of manufacture.

Can we use the Ghost Wipe to collect for Cr6 analysis? OSHA has stated that these should not be used for this anaysis.GW is not made up w/MCE fibers? MSDS doesn\'t show this

The GhostWipe is intended for use in lead and beryllium testing. As such, these are the only two metals for which we do background testing and issue certifications of cleanliness. If you wish to test for other materials it would be your responsibility on a per lot basis to test and decide if the GhostWipe would provide an appropriate level of detection for you. We have had other customers report successful use of the GhostWipe for other metals, including chromium. If your local authorities state that they are not appropriate for what you want, there is not much we can do to counter that. The wipes are made of polyvinyl alcohol and do not contain MCE.

are the checmicals on the wipe safe on human skin ? Can you use them on face and hands as a sanitizer ?

The Ghost Wipes are pre-moistened with deionized water which is certainly safe for contact on human skin. There are no other chemicals in the solution.

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