Correction    

We apologize for the mistake on page 41 and page 42 of China Chemical Reporter Vol.20 No.4&5 combine issue published on February 16th, 2009. On the top of the datasheet, the first 'Avg. of Jan-2008' should be 'Avg. of Jan-2009'. Please correct it yourself on your subscribed publication.
    China Chemical Reporter editorial team.