Precipitation separation type continuous flow analytical apparatus and quantitative analysis of thiourea in copper electrolyte

A flow analysis apparatus comprising:

• a capillary flow path, said capillary flow path comprising:
• a sample addition portion,
• a precipitant addition portion downstream of said sample addition portion,
• a heated reaction zone downstream of said precipitant addition portion,
• a filtration portion downstream of said heated reaction zone,
• a reagent addition portion downstream of said filtration portion, and
• an analytical portion downstream of said reagent addition portion,
• wherein said filtration portion comprises a washing pipeline and a filtration loop, the filtration loop in fluid communication with a solution adjustor supply pipeline, the filtration portion being capable of selectively connecting the filtration loop in fluid communication with both the heated reaction zone and the reagent addition portion or the washing pipeline.