Lead in refrigerant

[luv2golf]

supposedly a testing company has found lead in the refrigerant (low temp). The mechanicals were all experienced so I don't believe they used lead solder. Anyone have an idea where the lead might come from?

[US Iceman]

You did not really give us much information to use. What type of:

compressors do you have?
piping material is used?
refrigerant is it?
Is this the first time you have noticed lead, or is this the first time you have checked?

and,

What were you testing? The oil perhaps?

[Brian_UK]

Also, the use of the word "Supposedly".

Did they or didn't they ?

[luv2golf]

Sorry,
Copeland Discuss
R-22 (new when put in, not reclaim)
Copper pipe

5 ppm lead (not much but still, where did it come from)

Moisture was at 77 ppm with white sludge.

sounds like a serviceman breached the system

Been operating for 1 1/2 yrs. Warr out after 12 months, different company servicing.

thanks

[US Iceman]

If soft solder was not used, then what you may be seeing is residue material from compressor bearings.

[Grizzly]

Luv2golf
As Iceman indicates it could well be from your "white metal" Bearings as these are generally an alloy of Lead and Tin.
So especially as you state this Compressor has worn out after 12 months.
Due in part to huge Copperisation no doubt?
Based on the moisture content you quote.
Grizzly