Inquiry (采购产品): nanofiltration membrane I am interested in a membrane that separate sodium sulfate but not sodium sulfite nor soium bi-sulfite in nanofiltration My tel no is 973-560-8861 **** Hidden Message ***** Joseph HSIEH 07054 Company: DuPont BELCO E-mail: hsieh@belcotech.com **** Hidden Message ***** hsieh@belcotech.com