Hi Phil,

Depending on what elements you want/need to monitor, you might be able to use XRF (but you'd have to run statistically sound number of measurements).
Vladimir

SENTEC Testing Laboratory Inc.
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (416) 899-1882
Fax: (905) 882-8812
www.sentec.ca

-----Original Message-----
From: Phil Bavaro <[log in to unmask]>
Sender: TechNet <[log in to unmask]>
Date: Tue, 6 Sep 2011 16:10:30 
To: <[log in to unmask]>
Reply-To: TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Subject: [TN] Solder bath purity testing questions

I just installed a small selective solder rework system and now have to
start testing the solder bath for purity.

Who do you use for testing your solder bath for purity?  I cannot seem
to find the old standby sources I had used in the past.

Do I have to keep the solder purity analysis going back to the same
company that I buy the bars from (alp___ to alp___, kes___ to kes___,
etc) or has this service been farmed out permanently to independent
labs?  I am not able to find it quickly on the internet.

I thought about trying to use an XRF machine to perform my analysis
myself but I am a little skeptical about its' precision.  

Lastly, I find that the words in J-STD-001 seem a bit excessive for my
situation:

	"Records containing the results of all analyses and solder bath
usage (e.g., total time in use, amount of replacement solder, or
area throughput) shall be maintained for a minimum of one year for each
process/system."

Do I really need to record the time that we have the solder molten?  I
can understand recording volume of solder introduced, but this is a
rework pot and the usage and throughput would be minimal.

Any help is appreciated.

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