IPC-TM-650 TEST METHODS MANUAL

1 1 ScopeThis test procedure is designed to measure thelevel of anionic and cationic residues on the surface ofunpopulated (bare) printed boards by ion Applicable DocumentsIPC-WP-008 Setting Up Ion Chromatography Capability3 Test SpecimenAny printed board4 Apparatus and Chromatograph capable of accurately measuring ionconcentration down to parts per million (ppm). The equip-ment and chemistry should be set up and standardized perthe manufacturer s instructions. The separation column andeluent composition should be chosen to provide good sepa-ration of the ions of Water Bath capable of maintaining 80 2 C[176 F].

2 Extraction gloves, , cleanroom vinyl gloves. (<3 ppm ofChloride). water with a starting resistivity of at least or ACS grade chemicals for eluent and regener-ant standard - traceable calibration standards ( ,NIST traceable).Note:At the time of publication of this test method, a trace-able industry adipic acid standard does not exist. Future revi-sions to this test method will indicate such traceability (IPA), ACS grade or Flasks (Typically 25, 50, 100, and 1000 ml) Pipetting Equipment (such as Eppendorf) extract solution sample containers or auto-sampler vials if an auto-sampler is used with the syringes should be used for MANUAL Test Extraction ProcedureSelect a low-ion extraction bagsized to fit the board with approx.

3 Cm [ in] excess oneach side to minimize required extract solution, with severalinches at the top to allow for air expansion when the bag clean gloves when handling the samples to betested. Place each sample in an extraction a 10%/90% volume/volume 2-propanol /deionized water solution for the a known volume of the extraction solution tothe extraction bag covering the printed board (approx. surface area). the same volume of extraction solution to anempty bag of the same lot for use as a the bags into the 80 2 C[176 F]water bath allowing the water to force most of the air from thebags.

4 Do not allow any of the water from the water bath intothe extract solution in the bags. Fold the top of the bags overthe suspending bar and clip in place with binder clips. This willminimize solvent loss during the extraction, yet not create asealed bag. Alternatively, the bags may be heat sealed afterforcing most of the air from the the sample to soak for one hour (-0 min., +5min.). the bags from the water bath and allow thebags/solution to cool to room Lakeside Drive, Suite 309 SBannockburn, IL 60015-1249 IPC-TM-650 TEST METHODS Printed Board Cleanliness by IonChromatographyDate12/2009 RevisionOriginating Task GroupIon Chromatography/Ionic Conductivity Task Group(5-32a)Material in this Test METHODS MANUAL was voluntarily established by Technical Committees of IPC.

5 This material is advisory onlyand its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the use, application, or adaptation of thismaterial. Users are also wholly responsible for protecting themselves against all claims or liabilities for patent referenced is for the convenience of the user and does not imply endorsement by the bag to mix the contents. Transfer solutionto virgin sample vials for analysis or pull the sample solutiondirectly from the bag using a clean syringe for MANUAL the test board from the bag, using Calibration ions in the calibration procedure are a ions may be added to the determination if part per million (ppm) is 1 milligram of the ionic spe-cies (solute, , chloride ion) per 1000 grams of or purchase a combination stock anion stan-dard solution.

6 5 ppm fluoride, 25 ppm acetate, 50 ppm for-mate, 20 ppm methanesulfonic acid (MSA), 50 ppm chloride,50 ppm bromide, 20 ppm nitrate, 200 ppm adipate, 100 ppmsuccinate, 20 ppm sulfate, and 20 ppm standard stock can be prepared from 1000ppm stock solutions using the following formula:Combine ml fluoride; ml MSA, nitrate, phosphate,and sulfate; ml acetate; ml formate, chloride, andbromide; ml succinate; 5 ml adipate; in a 25 ml volumet-ric flask. Dilute to volume with 10% 2-propanol / 90% deion-ized water.

7 The stock solution is stable for several weeks ifkept refrigerated. Warm to room temperature before or purchase a combination stock cation stan-dard solution: 5 ppm lithium, 50 ppm sodium, 50 ppm ammo-nium, 50 ppm potassium, 50 ppm magnesium, and 50 standard stock can be prepared from 1000ppm stock solutions using the following formula:Combine ml of the lithium standard and ml of thesodium, ammonium, potassium, magnesium, and calciumstandards in a 25 ml volumetric flask. Dilute to volume with10% 2-propanol / 90% deionized water.

8 The stock solution isstable for several weeks if kept refrigerated. Warm to roomtemperature before volumes of anion calibration standard solutionfor a three point 1: ( ppm fluoride, ppm acetate, ppm formate, ppm methanesulfonic acid (MSA), chloride, ppm nitrite, ppm bromide, ppmnitrate, ppm adipate, ppm succinate, ppm sulfate,and ppm phosphate) Pipet 1 ml of the combination stockstandard solution to a 100 ml volumetric flask. Add 20 micro-liters of 1000 ppm nitrite purchased stock solution and diluteto volume with 10% 2-propanol / 90% deionized water.

9 Mixwell. Prepare fresh daily. (Nitrite is not stable over long periodsof time) 2: ( ppm fluoride, ppm acetate, formate, ppm methanesulfonic acid (MSA), ppmchloride, ppm nitrite, ppm bromide, ppm nitrate, ppm adipate, ppm succinate, ppm sulfate, ppm phosphate) Pipet 1 ml of the combination stock stan-dard solution to a 50 ml volumetric flask. Add 40 microliters of1000 ppm nitrite purchased stock solution and dilute to vol-ume with 10% 2-propanol / 90% deionized water. Mix fresh daily.

10 (Nitrite is not stable over long periods oftime). 3: ( ppm fluoride, ppm acetate, formate, ppm methanesulfonic acid (MSA), ppmchloride, ppm nitrite, ppm bromide, ppm nitrate, ppm adipate, ppm succinate, ppm sulfate, ppm phosphate) Pipet 1 ml of the combination stock stan-dard solution to a 25 ml volumetric flask. Add 80 microliters of1000 ppm nitrite purchased stock solution and dilute to vol-ume with 10% 2-propanol / 90% deionized water. Mix fresh daily. (Nitrite is not stable over long periods oftime).