Detailed Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: GC-MS is the best way for forensic experts to identify substances because it is a " specific test " .
A:
GC-MS has been regarded as a " gold standard " for forensic substance identification because it is used to perform a 100 % specific test , which positively identifies the presence of a particular substance .