Calculation of oil-bearing concentration of "full-layer water column," in which the concept of "background water depth" is too critical

Calculation of oil-bearing concentration of "full-layer water column," in which the concept of "background water depth" is too critical

Full-layer water column refers to the water column including oil film layer, opacified layer and dissolved oil layer. It is not geometric 

 oil-containing water column from the surface layer to the bottom layer of water body. DR-801 C A water sampler for collecting a 

segment of oil-containing water column (Download) -the manufacturer of intercepted oil stratification sampler-Shanghai Haoqi. 

However, the physical and chemical properties of petroleum substances in water are insoluble in water. That is to say, even if 

dissolved oil exists, the first content is very small, and the second cannot be located in the deep water body. Therefore, we put 

forward the concept of "background water depth," which means that the depth exceeding the background should not be 

calculated. 

The Proposal of the Concept of "Full-layer Water Column" of Oil in Water-The Manufacturer of Intercepting Oil in Water Stratified 

Sampling Device-Shanghai Haoqi

The environment where the whole layer of water column is actually collected can also meet, usually the water depth is relatively 

shallow (≦15 cm), and the enterprise pollution source sewage outlet, beach and river beach are all possible. 

Since it is water column and stratification, we shall take samples and calculate according to such logic, and collect oil film layer  samples with DR-801 C oil film bottle respectively, as shown in the following figure

                                                                    DR-801 C oil film bottle

Use DR-801 C constant volume bottle to collect dissolved oil and water sample, as shown in the figure below

                                              DR-801 C constant volume bottle

It is recommended to use the formula recommended in the operation manual when using the DR-801 C sampler. The concept of 

"full-layer water column" of oil in water is put forward. 

The first step is to collect the water sample of oil film layer, which is the surface of water body. Take the special oil film bottle of 

DR-801 C for collection. There is no clear limit between the water sample of emulsion layer and the water sample of oil film. 

Therefore, the specific gravity of petroleum substance is less than that of water, float on the water surface, add the extractant, 

vibrate the extraction, use the oil meter to extract mg, and pay attention to the weight unit. 

Next, collect water samples of dissolved oil layer. This is a bit complicated. You may need to collect water samples of several depths, 

such as 15 cm, 20 cm, 30 cm and 50 cm. Find the background water depth DR-801 C detailed explanation of enterprise standard 

noun: Background water depth-intercepted oil stratification sampler manufacturer-Shanghai Haoqi. This value is very important. It 

shall participate in the final calculation. (We guess that the water depth of 30 cm should be the background water depth. After all, 

the physicochemical property of petroleum substances is insoluble in water. Here it only refers to petroleum substances, except 

animal and vegetable oils and fats. Users who have purchased DR-801 C can consider this aspect of the project, organize scientific

 research, and the dynamic model of petroleum substances migrating in water. No one has done it in the world. ) . Similarly, take 

DR-801 C special constant volume bottle, collect dissolved oil, add extractant, vibrate extraction, use oil meter, extract liquid to 

obtain mg, pay attention to weight unit. 

Substituting into the formula, the concept of "full-layer water column" of oil in water is put forward-the manufacturer of 

intercepting oil in water stratified sampler-Shanghai Haoqi, and the result is mg/l. 

In fact, finding the depth of the background value is a great success, the same enterprise discharge outlet, the same basin or the 

same water area have their own laws of change, according to the definition of the background value once a year to do a random 

inspection and verification. 

The collection and calculation of petroleum substances in water should be explained clearly. In summary, there are two points: 1. 

The oil in water is insoluble in water and exists in layers in water. The data of which layer alone cannot describe the general situation

 of water oil pollution scientifically and accurately. Oil film? The numerical value is obviously higher; What is the significance of using 

so-called dissolved reservoirs if they are collected outside the background value? Will mislead the ecological environment 

management; 2. Oil concentration of water column is more scientific instead of oil concentration of environmental water body. 

Next, we will discuss the significance of calibration through measurement and the significance of original water sampling.