quotationmark validation error

[Teramus]

Dear community,

when i use quotationmarks in the Producttitel i got the problem, that the w3c validator and also the search engines interprete the quotationmarks as meta content. is there a way to maske the quotationmarks or a way to prevent this error.

Regards
Teramus

That is the Code:

Line 951, Column 80: Attribute peace not allowed on element meta at this point.

        <meta itemprop="itemReviewed" content=""Peace Food" von Ruediger Dahle">

Attributes for element meta:
    Global attributes
    name
    http-equiv
    content
    charset