Handheld infrared spectroscopic device and its use method. The device is a hand-held spectroscopic device, and may be a smart phone, or smart phone, tablet, portable information terminal, computer, or other portable device capable of performing applications Integrated with the device. The liquid sample port is integrated with the device and is close to the spectrometer of the device, the device spectrometer conducts infrared spectral analysis of the liquid sample, which is highly detailed and detailed with portability The spectral analysis of a liquid sample can be performed. The device has a wireless communication function to transmit data and spectrum images globally. Diagram
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