Depends on how accurate you want to be.  

A good method is flame Atomic Absorption Spectroscopy (AAS), which analyzes impurities at the ppm level.

As for spark, are you referring to an Arc/Spark Optical Emission Spectrometer?  A quick tool for determining alloy compositions...usually requires a larger sample...and commonly used for steel or aluminum alloys.

Regards,

Hans Shin
Pacific Testing Laboratories, Inc.
www.pacifictesting.com

-----Original Message-----
From:   Kathy Kuhlow [SMTP:[log in to unmask]]
Sent:   Friday, May 18, 2001 2:31 PM
To:     [log in to unmask]
Subject:        [TN] Solder Pot Analysis

What is the most reliable method of solder pot analysis?  I know the Keister uses the spark analysis and Alpha uses a wet chemistry method (I think).  What are the differences and which is more reliable?

TIA

Kathy

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