(a) Reagent list No. Reagent name Quantity unit Note 01 Phenol solution 4 bottle 100ml/bottle 02 Sodium hypochlorite 8 bottle 100ml/bottle 03 Ammonium nitrogen standard solution (4ppm) 2 bottle 100ml/bottle 04 Ammonium nitrogen standard solution (8ppm) 1 bottle 100ml/bottle 05 Molybdenum sulphate 4 bottle 100ml/bottle 06 Effective Phosphorus Standard Solution (1ppm) 2 bottle 100ml/bottle 07 Effective Phosphorus Standard Solution (2ppm) 1 bottle 100ml/bottle 08 EDTA solution 1 bottle 100ml/bottle 09 Sodium tetraphenylborate solution 2 bottle 100ml/bottle 10 Formaldehyde solution 1 bottle 100ml/bottle 11 Available potassium standard solution (20ppm) 3 bottle 100ml/bottle 12 Potassium dichromate solution 4 bottle 100ml/bottle 13 Organic standard liquid 1 bottle 100ml/bottle 14 Potassium chloride 15 bag 15g/bag 15 Sodium bicarbonate 20 bag 8.4g/bag 16 Sodium nitrate 20 bag 17g/bag 17 Citric acid 10 bag 4g/bag 18 ascorbic acid 1 bag 10g/bag Note: (1) Please purchase from this reagent tank for the lack of concentrated sulfuric acid (mainly used when testing soil organic matter). (2) After the chemical liquid in the reagent box is used, it can be purchased at the local chemical store. If individual reagents are not available for a time, you can contact the Qiangsheng Instrument Center for purchasing. (b) Appliance List No. Appliance name specification Quantity Note 01 Tianping 1/10 1 set The balance can only measure the soil, such as measuring the fertilizer needs more than 1/100 balance. 02 White plastic bottle 4 03 Pipette 5ml 1 04 Pipette 10ml 1 05 Beaker 100ml 6 06 Triangle bottle 50ml 2 07 Measuring cylinder 100ml 1 08 Volumetric flask 50ml 2 09 Volumetric flask 100ml 2 10 Volumetric flask 200ml 1 11 Wash bottle 1 12 Suction ball 1 13 dropper 3 only 14 filter paper 1 box 15 Spoon 1 Note: The use and maintenance of some vessels: 1. Wash the new glassware first with water, then soak it in hot potassium dichromate bath to remove impure substances, then rinse with water, and finally wash it several times with distilled water. . 2. For greased glassware, it can be washed with hot soapy water or alkaline alcohol lotion, and finally washed several times with distilled water. 3. Wash the plastic utensils with 1+3 nitric acid and rinse with distilled water. 4. When using vessels such as pipettes, volumetric flasks, and graduated cylinders in the experiment, make the liquid bottom surface parallel to the scale of the vessel. 5. When using the balance, place the balance on the workbench steadily, so that the pointer on both sides of the balance is stable on the central tick line. If the pointer is continuously swinging to both sides, the balance can be adjusted so that the swing distance of both sides of the pointer is equal. 6, special attention, in the experiment using concentrated sulfuric acid and water, concentrated sulfuric acid should be slowly injected into the water, can not be injected into the concentrated sulfuric acid water. Hangzhou Top Instrument Co., Ltd. Room 806, Songdu Building, No. 69 Wangjiang Road, Hangzhou Tel 86059660 86062776 fax Medium-sized Courtyard Scrubber The medium-sized courtyard scrubber is suitable for cleaning the floor of a large garden, with simple operation and high efficiency. Medium-Sized Courtyard Scrubber,Floor Pressure Washer,Household Portable High Pressure Washer,Portable Car Pressure Washer Ningbo Senmiao Trading Co., Ltd. , https://www.nbsenmiao.com
There are some minor issues that need to be paid attention to in the process high-pressure cleaners, which are summarized as follows:
1. When operating the high pressure washer: Always wear proper goggles, gloves and masks.
2. When the Spray Gun of the high pressure washer is not used, the setting trigger must always be locked in a safe state.
3. Always check all the electrical connections of the high pressure washer.
4. Frequently check all the high-pressure cleaner fluids.
5. Always keep hands and feet away from the cleaning nozzle.
6. Before disconnecting the hose, always release the pressure in the Washing Machine.
7. Always use low pressure to work as much as possible, but the pressure must be sufficient to complete the work.
8. Never start the equipment before turning on the water supply and allowing proper water to flow through the spray gun stem. Then connect the required cleaning nozzle to the spray gun stem
superior.
9. Always drain the water in the hose after each use.