POWER OF ATTORNEY

	KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints Jeffrey A. Smagula signing singly, the undersigned's true and lawful attorney-in-fact to:

(1)	execute for and on behalf of the undersigned, in the undersigned's capacity as an
officer of Millipore Corporation (the "Company"), Forms 3, 4 and 5 in accordance
with Section 16(a) of the Securities and Exchange Act of 1934 and the rules
thereunder;

(2)	do and perform any and all acts for and on behalf of the undersigned, which may
be necessary or desirable to complete and execute such Form 3, 4 or 5 and
timely file such form with the United States Securities and Exchange Commission
and any stock exchange of similar authority; and

(3)	take any other action of any type whatsoever in connection with the foregoing
which, in the opinion of such attorney-in-fact, may be of benefit to, in the best
interest of, or legally required by, the undersigned, it being understood that the
documents executed by such attorney-in-fact on behalf of the undersigned
pursuant to this Power of Attorney shall be in such form and shall contain such
terms and conditions as such attorney-in-fact may approve in such attorney-in-
fact's discretion.

	The undersigned hereby grants to such attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the
exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact of such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights
and powers herein granted.  The undersigned acknowledges that the foregoing attorneys-in-fact,
in serving in such capacity at the request of the undersigned, are not assuming, nor is the
Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934.

	This power of attorney shall remain in full force and effect until the undersigned is no
longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier revoked by the undersigned in a
signed writing delivered to the foregoing attorney-in-fact.

	IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 8th day of February, 2008.


							/S/ Wei Zhang
							Signature for Wei Zhang