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topic 9675

Alodine 600 Sulfate and Chloride Contamination


Q. Could someone give me some direction on where I might find a procedure for checking Sulfate and Chloride levels in "Alodine 600" ?

Thank you,

Perry Lambert
- Arkansas


A. Try "Volumetric Analysis of Metal Finishing Solutions" [link is to info about the book at Amazon] by Andrew McFadyen.

James Totter
James Totter, CEF
- Tallahassee, Florida

July 31, 2017


DETERMINATION: Trace Anions in Alodine Solutions (Cl-, SO 4 = and PO 4-3 ).
a.Dionex Ion Chromatograph or equivalent.
SYSTEM SET-UP: a.COLUMNS: i)GUARD: Dionex OmniPac PAX-100 or equivalent. ii)SEPARATOR: Dionex OmniPac PAX-100 or equivalent.
b.SUPPRESSOR: Anion Micromembrane Suppressor i)AUTOREGENERANT: 25 mN H 2 SO 4 ii)FLOW RATE: approx. 8 ml./min @ reagent outport
c.ELUANTS: i)ELUANT#1: DI H 2 O ELUANT#2: 50% (v/v) CH 3 CN ELUANT#3: 100 mN NaOH ELUANT#4: N/A in a ratio of: #1 45% / #2 10% #3 45%
ii)FLOW: 1 ml/min
d.DETECTOR: Conductivity
i)BACKGROUND: approx. 4.0 µS ii)OUTPUT RANGE: 30 µS iii)SCALE: 30000 nS
SAMPLE PREPARATION: 1:1000 dilution with DI H 2 O
STANDARDS: F-/ Cl-/ NO 3-/ SO 4 = / PO 4-3 in CrO 3 i)LEVELS: 3

Cory McGraw
- Auburn, Washington USA

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