Patent ID: 7971627

Claim:
A process for producing a solder sample to analyze a Pb content of a molten solder in a solder tank, the method comprising: a step of immersing a mold in the molten solder, the mold comprising a lower mold having a concave part which can receive the molten solder, and an upper mold having a convex part which fits in the concave part, wherein when the mold is closed so as to insert the convex part in the concave part, a sample collection space is formed between a bottom of the concave part and a lower surface of the convex part, wherein the lower surface of the convex part is a planar surface, and wherein the mold is immersed in the molten solder in the closed state, a step of heating the mold in the molten solder in a solder tank until its temperature approaches a temperature of the molten solder so as to return a solidified solder surrounding the mold to a molten state, a step of opening and closing the mold in a molten metal to collect the molten solder in the sample collection space, a step of removing the mold in the closed state from the molten solder, a step of cooling the mold to solidify the molten solder, and a step of removing a solidified solder sample from the mold for analysis, wherein the sample collection space is a thin space of 0.3 to 1.5 mm, and the mold surrounding the sample collection space has a thickness of 1 to 5 mm.