n. 化验者, 分析者

[法] 化验人, 分析人

[ noun ]
an analyst who assays (performs chemical tests on) metals
<noun.person>

Assayer \As*say"er\, n.
One who assays. Specifically: One who examines metallic ores
or compounds, for the purpose of determining the amount of
any particular metal in the same, especially of gold or
silver.