IPC-TM-650 TEST METHODS MANUAL
5.2.6.3 Standard 3: (0.2 ppm lithium, 2.0 ppm sodium, ammonium, potassium, magnesium, and calcium) Pipet 1 ml of the combination stock standard solution to a 25 ml volu-metric flask and dilute to volume with 10% 2-propanol / 90%
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