(Cl; 23-142) As is known, the thermal decomposition of alpha. alumina trihydrate leads, by partial decomposition, to an activated alumina characterized by a large specific surface which imparts to it remarkable adsorbent properties. The specific surface of the dehydrated product depends on its water content.
First things first; decide whether you will use double or single quotation marks for the initial quote. If you use single quotations marks, then you should use double quotation marks for a quote within a quote. If you use double quotation marks, then you should use single quotation marks for a quote within a quote. For example: When I say 'immediately,' I mean some time before August, said the manager.
http://www.w3.org/TR/2008/REC-xml-20081126/#syntax. To allow attribute values to contain both single and double quotes, the apostrophe or single-quote character (') may be represented as  &apos; , and the double-quote character () as  &quot; .