How to deal with vegetables can make us feel at ease
Urinalysis test strips refer to test strips that test for bilirubin, urobilinogen, ketone bodies, ascorbic acid, glucose, protein (albumin), blood cells, PH, etc. in urine. Urine Reagent Strips,Urine Test Strip,Urine Sugar Strip Test,Visual Urine Analysis Strips Jilin Sinoscience Technology Co. LTD , https://www.contoryinstruments.com
Vegetables are washed and fried vegetables for a long time, and the nitrite content will increase due to the activity of microorganisms. Zui is good to allocate the required amount after cooking, and the rest is stored in the refrigerator as soon as possible, so that the amount of nitrite rise will be small on the second day. After the cooked green leafy vegetables were placed in the refrigerator for 24 hours, the nitrite increased only from 3 mg/100 g to 7 mg/100 g, and the safety problem was less.
If the vegetables are boiled quickly in boiling water, most of the harmful substances such as nitrates, nitrites and oxalates can be removed. In addition to sterilization, most pesticides will be volatilized and decomposed, especially green peppers, which are easy to apply systemic pesticides. After washing completely, the zui is chopped and burned for about 1 minute, and the pesticide under the epidermis can be dissolved. However, remember that the soup after scalding contains pesticides, do not eat it again, and when heated, open the lid to allow the pesticide to volatilize with the vapor.
Imported vegetables should pay attention to the imported vegetables. Due to the long delivery period, the refrigerating time is relatively long. Even if the air transport is carried out, it is easy to apply the fungicide to avoid spoilage due to various conditions of the handling environment. It is necessary to clean it well before eating.
In addition, vegetables rushed before the typhoon, due to better market prices, easy to ignore the safe harvest period of pesticide use; non-seasonal vegetables, pesticide use is large; high economic value vegetables, due to better market prices, in order to avoid Being bitten by the insects will reduce the price and there may be residual pesticides; the above points are worth paying attention to when purchasing and cleaning vegetables.
Good refrigeration results, fresh vegetables, nitrite content is very small. If you buy vegetables for two or three days, the nitrite will rise, especially green leafy vegetables. When vegetables are stored at room temperature for 1-3 days, the nitrite will reach a peak quickly, and under cold conditions, it will reach a peak in 3-5 days. For green leafy vegetables such as spinach, nitrite production is particularly large, refrigerator storage is much better than room temperature storage, and for cucumber and potato (potato), the difference is not so obvious.
If the cabbage is bought, it must be cleaned and stored in the refrigerator. If the leaves of the outer layer of Zui have dark spots, breakage or yellowing, they must be removed first. The method of taking the leaves is to cut and cut, not only the taste is good, but also the pollution caused by the cabbages caused by the cuts can be avoided, and the preservation period and freshness are reduced. Put the whole Korean dish in a clean plastic bag and store it in the refrigerator for about 5 days.
Through the above knowledge, we can learn about the use of vegetables. If you want to know more, you can go to our company's website to learn more about vegetable cleaning.
Detection principle
1. pH: The pH value in the range of 5-9 is measured by the pH indicator, and the pH value of the fresh urine of a normal person is between 5-7.
2. Nitrite: The reaction is based on the reduction of nitrate to nitrite by Gram-positive bacteria in the urine. The nitrite reacts with p-aminobenzenesulfonic acid to form diazonium compounds, which are then combined with N-(1-naphthalene) )-3 aminopropanesulfonate combined with a pink color.
3. Glucose: According to the reaction principle of glucose oxidase, glucose oxidase specifically oxidizes glucose to generate glucuronic acid and hydrogen peroxide. Under the action of hydrogen peroxide, hydrogen peroxide oxidizes the indicator and turns color. .
Classification
Urinalysis test strips are divided into visual series and machine series. The visual inspection series is divided into several models according to different inspection items; the machine inspection series is divided into several models according to different applicable instruments.
1. Classification by measurement method
1) Visual inspection series
When observing the result, compare the color with the standard color code within the time specified on the color code, judge and read the result.
2) Machine test series.
For instrument operation, refer to the instruction manual of the Urine Analyzer used.
2. According to the number of measurement items
There are single-item, 2-item, 4-item and multiple test strips. Currently, 10-item or 11-item multiple test strips are most commonly used in hospitals.
3. Classification by structure
Urinalysis test strips with single-layer membrane structure and multi-layer membrane structure.