The invention discloses an
acid rain total-analysis online
monitoring system which comprises a rainwater collecting device, a rainwater measuring device, a rainwater sample reserving device, a pipeline cleaning device, a control device and a sample separating unit with a rainwater metering function. The sample separating unit with the rainwater metering function comprises a metering
bottle; A main flow dividing
pipe at the lower end of the metering
bottle is communicated with a measuring groove of the pH value and
conductivity measuring unit through a first flow dividing
pipe, is communicated with the
ion measuring unit through a second flow dividing
pipe, is communicated with the rainwater sample reserving device through a third flow dividing pipe; the metering
bottle comprises a 35cc metering bottle and a first positioning
electrode detection bottle; and a
reflux pipe communicated with the 35cc metering bottle is also arranged in the 260cc reserved sample
temporary storage bottle of the rainwater sample reserving device. According to the
acid rain total-analysis online
monitoring system, the monitoring interference caused by
corrosion or
electrolysis of the positioning detection
electrode can be avoided, monitoring interference caused by residual liquid in a container and a pipeline is reduced, and detection analysis deficiency when rainfall is insufficient is made up.