Current：

Aquaculture tail water detection

Detection index

Detection type	Test item	Analytical method	Detection limit
Surface water	Chemical oxygen demand CODMn	"Water quality determination of permanganate index" GB/T 11892-1989	0.5mg/L
	Ammonia nitrogen	Water quality-Determination of ammonia nitrogen-Nasireagent spectrophotometric method: HJ 535-2009	0.025mg/L
	Total phosphorus	Water quality-Determination of total phosphorus-ammonium molybdate spectrophotometric method: GB/T 1893-1989	0.01mg/L
	Total nitrogen	Determination of total nitrogen in water quality - Alkaline potassium persulfate digestion-ultraviolet spectrophotometry: HJ636-2012	0.05mg/L

Detection index

1. Surface Water Environmental Quality Standard (GB3838-2002)

2. Sampling Technical Guidance (HJ 494-2009)

3. Water Quality Sample Maintenance and Management Technology (HJ 493-2009)

4. Technical Guidelines for Environmental Monitoring and Quality Management (HJ 630-2011)

5. Technical Specification for Surface Water and Sewage Monitoring (HJ/T91-2002)

6. Operation Instructions for Monitoring Tasks of National Surface Water Environmental Quality Monitoring Network (Trial)

Publicize the quality and safety of aquatic products, prevent drowning and power safety accidents to all aquaculture subjects, design and make relevant publicity materials and safety labels to be distributed to aquaculture subjects, take photos on the scene for evidence, feedback the safety status of all aquaculture subjects, and urge them to improve safety awareness and compliance management. Promote the concept of green, civilized and safe aquaculture, and promote the healthy development of aquaculture industry.