Sampling rules and usage environment of water sampler I. Introduction:
With the rapid development of human production and industry, the amount of wastewater and other wastes has increased greatly, not only polluting water sources, but also endangering human health and affecting industrial development. Water samplers are widely used in environmental protection, water supply, and chemical industries. Water samplers can be divided into manual samplers and automatic samplers. The manual sampler can detect the abnormal condition of water quality in time for timely adjustment (such as the length and distance of the valve can be easily adjusted when the water sample area is inconvenient to collect), the advantage of the automatic sampler can be sampled by the vacuum principle, which can reduce human error, and the disadvantage is that Causes the loss of dissolved gases and some light floats.
Second, sampling rules and methods:
1. When collecting the water sample volume, it should be set up for all the test items. Generally, the sample collected in an instant is 1-2L, the mixed sample is 25-100ML, and the total amount is 1-4L.
2. The sample bottle and sampling device should be clean and free of pollution. Before sampling, the sampler should be washed several times with waste water. Care should be taken to prevent the solute in the water from adsorbing on the surface of the container.
3. The sampling point should be set in the wastewater. The hydraulic turbulence is high because of the high flow rate and the smallest solid deposit.
Third, the use of different sampling environments:
1. In the ground ring, if the distribution of oil and suspended matter in the wastewater is uneven, the deposition should be removed in time to reduce the measurement error. The sampling time should be measured when the concentration of harmful substances is the highest.
2. When sampling the tap water with the water sampler, the water should be drained for a few minutes, so that the water accumulated in the water pipe has been replaced by the new water, and then the water sample is collected. After collection, it should be stored in a place where it does not change. For example, water samples containing volatile and unstable components should be placed in a separate container, filled and sealed.
Pain Relief Patch(Pain Areas)
Pain Relief Patch
[Name] Medical Cold Patch
[Package Dimension] 6cm×8cm 4pieces/box
The pain relief patch is composed of three layers, namely, backing lining, middle gel and protective film. It is free from pharmacological, immunological or metabolic ingredients.
[Scope of Application]
For cold physiotherapy, closed soft tissue only.
[Indications]
The patches give fast acting pain relief for strains, sprains, cramp, bruises, swollen areas or joint stiffness.
[How To Use a Patch]
Please follow the Schematic Diagram. One piece, one time.
The curing effect of each piece can last for 6-8 hours.
[Attention]
Do not apply the patch on the problematic skin, such as wounds, eczema, dermatitis,or in the eyes. People allergic to herbs and the pregnant are advised not to use the medication. If swelling or irritation occurs, please stop using and if any of these effects persist or worsen.notify your doctor or pharmacist promptly. Children using the patch must be supervised by adults.
[Storage Conditions]
Store below 30c in a dry place away from heat and direct sunlight.
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