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| instruments | type | precision | source |
|---|---|---|---|
| electronic analytical balance | BSA-124S | ± 0.0002 g | Sartorius Scientific Instruments Co., Ltd., China |
| X-ray diffractometer | DX-2700 | a | Dandong Fangyuan Instrument Co., Ltd., China |
| flame atomic absorption spectrometer | iCE-3300 | a | Thermo fisher Technology Co., Ltd., China |
| low-temperature constant temperature and humidity thermostat | SDH-001 | ±0.2 K | Chongqing Inbo Experimental Instrument Co., Ltd., China |
Not detected.
