Detect encoding of JPEG in an XML Node

I have xml that has a jpeg values in xml nodes. How can I detect what the encoding is? It is not in CDATA.

starts like this:

0xFFD8FFE000104A46494600010100000100010000FFDB0043000302020302020303030304030304050805050404050A070706080C0A0C0C0B0A0B0B0D0E12100D0E110E0B0B10