采样时间开始于 2017 年 10 月 10 日并结束于 11 月 9

Sampling time starts at October 10, 2017 and ends on November 9, a sample was collected (day 08:00 ~ 08:00 the following day) per day during the sample while the temperature, humidity, wind speed and direction, and other meteorological data is recorded. <br>After the end of the sampling filters with aluminum foil wrap, dark transported back to the laboratory and stored in the refrigerator. <br>October 19 is not normally collected, so a total of 30 samples were collected.

The sampling time begins on October 10, 2017 and ends on November 9, 1 sample is taken daily during sampling (day time 08:00 to 08:00 the following day), while various meteorological data such as temperature, humidity, wind speed and wind direction are recorded.<br>The membrane is wrapped in aluminum foil after sampling and transported back to the laboratory with light and kept in the refrigerator.<br>No normal collection took place on October 19, so a total of 30 samples were collected.

The sampling time starts on October 10, 2017 and ends on November 9, 2017. One sample is collected every day during the sampling period (08:00 in the day to 08:00 in the next day), and various meteorological data such as temperature, humidity, wind speed and wind direction are recorded<br>After sampling, the filter membrane is wrapped with aluminum foil paper, transported back to the laboratory in dark and stored in the refrigerator<br>No normal collection was conducted on October 19, so a total of 30 samples were collected