1. detection significance:
Phenol is the most toxic in the phenolic compounds, and phenol is the main waste water in the industry of coking, production gas and oil refining. In the environment of phenol polluted water, after being absorbed by the body, through the body detoxification function, can make the most of the loss of toxicity, and excreted in urine, if entering the human body more than normal body detoxification function, the excess part can accumulate in various organs in the body tissues, causing chronic poisoning, there are different degrees of dizziness, headache, rash, pruritus, mental restlessness, anemia and various neurological symptoms and loss of appetite, dysphagia, salivation, vomiting and diarrhea and other chronic gastrointestinal symptoms. This chronic poisoning will not leave a sequelae due to proper treatment. Phenolic compounds such as surface water pollution, surface water as a source of drinking water, phenolic compounds and residual chlorine in water generate repulsive chlorophenol odor substances, the tap water has a special chlorophenol odor, the olfactory threshold of 0.01 mg / L. In water without free chlorine, the maximum permissible concentration of phenol is 1 mg / L. The maximum permissible concentration of volatile phenol is 0.1 mg / L (type V water) in the ground water in China. The water quality standard of drinking water in our country stipulates that the volatile phenols are not more than 0.002 mg / L.
2. operation method:
2.1 test preparation: connect the concentrating tube (resin adsorption tube) with syringe (see below), insert one end of the concentration pipe into the water, extract 1 ml water sample, and insert 2 acetone in acetone reagent, and discard all the water and acetone.
2.2 concentration of water sample: use a syringe to suck water samples 10 milliliter each time, after pumping, abandoned, total suction 10 times.
2.3 transfer the concentrating tube into the acetone reagent bottle and slowly draw 1.8 milliliters (1~2 minutes for suction, and the effect is not good).
2.4 phenol reagent tube 1, using a glass capillary tube forceps crushing plastic pipe cap to add a drop of water will be measured, acetone eluent injection syringe phenol reagent tube (see below), shake well to cap cap, after 3 minutes, from the port of the pipe and look down the standard color colorimetry.
2.5 resin adsorption tube after acetone elution can be used repeatedly 20 times.
This method is the fast detection method in the field, and the precise quantitative method should be based on the national standard method.
The 10mL syringe and the concentration tube (resin adsorption tube) are 1 each, the phenol reagent tube 20, the small sucker 2, compared with the color plate. Acetone is not convenient for transportation.
Stored in a cool and dry place, effective for 24 months. The date of production is packed