The sample concentrator employs a sweeping needle capture technique, which allows for simultaneous temperature-controlled heating of the samples. Utilizing inert gases such as nitrogen, it rapidly, controllably, and continuously blows onto the sample surface, achieving rapid anaerobic concentration of the sample volume. This method is characterized by its time-saving, convenient, and precise nature and is extensively applied in fields such as pesticide residue analysis, pharmaceutical testing, environmental analysis, bio-analysis, commodity inspection, and food and beverage testing.