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Topic: microwave digestion  (Read 5202 times)

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Offline abcc

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microwave digestion
« on: December 12, 2006, 10:06:15 PM »
Question: One reason that microwave digestion is preferred over the conventional method of wet ashing is that the blank value of microwave digestion is smaller. Explain.

2.What are the other advantages of microwave digestion?

anyone can help me  :'(
thx million

Offline Dolphinsiu

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Re: microwave digestion
« Reply #1 on: December 14, 2006, 12:38:37 PM »
A typical microwave acid digestion can be completed in a matter of minutes, whereas the same conventional hot plate digestion can take hours.

Microwave digestion usually involves placing a sample in an acid solution and heating to high temperature and pressure.

However, these extreme conditions will dissolve most materials, but is potentially quite dangerous.
Both HDPE and soil can be digested in concentrated HNO.

According to Howard M. Kingston of the National Bureau of Standards (NBS), Microwave digestion "is a new, more rapid tool for the analytical chemist involved in sample preparation, and it is capable of doing some preparations more reliably and accurately than can be done by conventional methods

(All of these infos can be found from Yahoo!Try hard la!)



Offline abcc

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Re: microwave digestion
« Reply #2 on: December 14, 2006, 09:19:22 PM »
A typical microwave acid digestion can be completed in a matter of minutes, whereas the same conventional hot plate digestion can take hours.

Microwave digestion usually involves placing a sample in an acid solution and heating to high temperature and pressure.

However, these extreme conditions will dissolve most materials, but is potentially quite dangerous.
Both HDPE and soil can be digested in concentrated HNO.

According to Howard M. Kingston of the National Bureau of Standards (NBS), Microwave digestion "is a new, more rapid tool for the analytical chemist involved in sample preparation, and it is capable of doing some preparations more reliably and accurately than can be done by conventional methods

(All of these infos can be found from Yahoo!Try hard la!)



thx ;D

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