Materials continued PFA Parts Cleaning Protocol Typical PFA parts cleaning protocols for low or sub partsperbillion metals extractable analysis: Method 1 1 Rinse four times inside and out with UHP deionized water 2 Fill with acid mixture HNO3 and HCI (7+2) or only with HNO3 (7%) for one day or leave overnight 3 Rinse four times with UHP deionized water 4 Fill again with acid mixture HNO3 and HCl (7+2) or only with HNO3 (7%) for one day or leave overnight 5 Rinse again four times with UHP deionized water and leave the PFA part filled with UHP deionized water or dry it (see 6) 6 For drying use a laminar flow clean bench Then rinse the PFA part with the sample or process liquid before using Use only ultra pure acids (purified by subboiling distillation) eg HF HNO3 and HCI Note: For more aggressive cleaning the use of more concentrated acids is recommended Method 2 1 Fill with 1 + 1 HCl (AR grade) Allow to stand one week at 80°C 2 Empty and rinse with distilled water 3 Fill with 1 + 1 HNO3 (AR grade) 4 Allow to stand one week at 80°C 5 Empty and rinse with distilled water 6 Fill with purest available distilled water 7 Allow to stand several weeks or until needed changing water periodically to ensure continued cleaning 8 Rinse with purest water and allow to dry in a particle and fumefree environment John R Moody and Richard M Lindstrom Reprinted from ANALYTICAL CHEMISTRY Vol 49 Page 2264 The above information is offered for reference only and is not intended as a specification This information is based on reports received from customers of Savillex Corporation who have been successful in adopting these protocols for low metals analysis It is intended for use by persons having technical skill at their own discretion and risk It is given with the understanding that those using these protocols will satisfy themselves that their particular conditions of use present no health or safety hazards We make no warranties express or implied and assume no liability in connection with any of this information As with any process or protocol evaluation under actualuse conditions prior to specification is essential 79 Phone 9529354100

We would like to take this opportunity to thank Savillex customers around the world for their business and loyalty We would also like to acknowledge that since the publication of our previous catalog Savillex founder Russell Saville passed away Russ took great pride in the catalog and in serving the many thousands of Savillex customers worldwide He left a genuine legacy of responsive customer service and product innovation We look forward to continuing to partner with you and provide you with new and innovative fluoropolymer solutions to help make your job easier and more efficient Nomex® and Tefzel® are registered trademarks of DuPont Ultem® is a registered trademark of General Electric Company