IC ion chromatography IPC-TM-650 2.3.28 ion chromatography (hereinafter referred to as IC) is a high performance liquid chromatography (referred to as HPLC) A is a liquid chromatography method for analysis of ions. Narrowly speaking, the charge is based on an ionic compound with the stationary phase surface ionic interactions between functional groups to achieve ion chromatography separation and analysis of substances; broadly speaking, is based on the measured object can be dissociative (ion sexual) by liquid chromatography separation method. Ion chromatography has been widely used in many areas of the environment, food, materials, industrial, biological and pharmaceutical. Application of IC ion chromatography: liquid chromatography for the separation of both, may also be used for quantitative analysis, a detectable ions: anionic: F-, Cl-, NO2-, Br-, NO3-, HPO42-, SO32-, S2O32-, SO42-, formic acid, acetic acid, oxalic acid, water disinfection byproducts cations: Li +, Na +, NH +, K +, Mg2 +, Ca2 + detection range: ppb to ppm level detection limit: 0.1ppb (dollars in Cl- ) 5.0 ppb (in Na + count) Nacl equivalent method IPC-TM-650 2.3.25c extract was cleaned by the surface of the sample and measuring the resistivity of the liquid collected to calculate the Nacl amount in the printed circuit board showing the degree of pollution per unit area. (Instrument: ionic cleanliness tester)