What should I do if the Nessler's reagent has a deposit?
If the Nessler's reagent was used to measure the nitrogen and nitrogen, the following methods could be tried: 1. ** For water sample treatment ** - If the water sample is turbid or has color, it can be treated by pre-sublimation or coagulation. After the water sample is processed before the purification, there is still a deposit after adding the Nessler's reagent, but there is no deposit after adding the Nessler's reagent into the water sample filtered by the 0.45um filter membrane. If there is interference from the calcium and magnesium-ion in the water, 200 - 300ml of the initial filtered liquid shall be discarded during the filtering to prevent the influence of the nitrogen on the filter paper. If the water sample had been processed before the purification process to eliminate the interference of calcium and calcium, the reason for the appearance of the precipitations after the addition of Nessler's reagent might be because the color was too low in the pH. At this time, the pH-value could be adjusted to the basic with a solution of soda. 2. ** For reagents ** - If it was because of the high content of the salt in the reagent (this situation would cause the blank analysis result to be higher), heating and boiling alone could not completely remove the nitrogen. A small amount of the solution could be added, and 20% - 30% of the solution volume could be evaporated by boiling. After cooling down, the solution was diluted to the original volume with the solution of no nitrogen, so as to effectively reduce the content of the salt in the solution. - Nessler's reagent should be kept at room temperature before use, and it should not be shaken before use. It should be used by absorbing the supernate and adding a suitable volume of Nessler's reagent according to the requirements of the national standard method. This is because during use, as the amount of Nessler's reagent added increases, the blank value will become higher. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
There is a red deposit when the Nessler's reagent is added to the nitrogen nitrogen.
If there was a red deposit in the water sample after adding Nessler's reagent, it might be because the water sample was acidic. According to the relevant standards, the Nessler's reagent method should be used to determine the nitrogen nitrogen in the basic solution. If the water sample was fixed with acid, the Nessler's reagent would be added directly without adjusting the ph to the appropriate range (6 - 9) during the measurement. The acidic environment of the water sample would cause red precipitations, which would affect the measurement results. In this case, the result of the test with a thermometer may be zero or the reagent blank value. This was because the components in the Nessler's reagent would normally react with nitrogen to form a reddish brown complex for determining the content of nitrogen and nitrogen under acidic conditions. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
Nessler's reagent diluted
There were two common methods to prepare Nessler's reagent. The following were the procedures for the two methods: 1. ** Diluting in the preparation of mercuric chloride-potassium oxide-potassium hydrogen ether (HgCl2-KI-KO) solution ** - First, weigh 15.0 g of potassium-dioxide solution, dissolve it in 50 ml of water, and cool it down to room temperature. Weigh 5.0 g of potassium-dioxide solution, dissolve it in 10 ml of water, and add 2.50 g of mercury-dioxide powder into the solution of potassium-dioxide solution several times under stirring until the solution turns dark yellow or a light red deposit appears. When the solution is slowly dissolved, stir and mix thoroughly, and then add a saturated solution of mercury-dioxide solution. When a small amount of vermilion deposit is no longer dissolved, stop dripping. - Then, slowly add the cooled solution of potash into the mixture of mercuric dicloride-potassium iodate under stirring, and dilute it to 100ml. Let it stand in the dark for 24h, pour out the supernate, and store it in a polythene bottle. Cover it tightly with a rubber stopper or a polythene cap, and store it in the dark. It can be stable for one month. 2. ** Diluting in the preparation of mercuric iodide-potassium iodide-soda ash solution ** - Weigh 16.0 g of soda ash, dissolve it in 50 ml of water, and cool it to room temperature; Weigh 7.0 g of potassium iodate and 10.0 g of mercury iodate, dissolve it in water, and then slowly add this solution into the 50 ml of soda ash solution while stirring. - Finally, dilute it to 100ml with water and store it in a polythene bottle. Cover it tightly with a rubber stopper or a polythene cap and store it in a dark place. The shelf life is one year. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
Nessler's reagent preparation
There were two ways to prepare the Nessler's reagent: 1. Mercuric chloride-potassium iodine-potassium hydrogen solution: Weigh 15.0 g of potassium-potassium hydrogen solution, dissolve it in 50 ml of water, and cool it to room temperature. Weigh 5.0 g of potassium iodate (Ki) and dissolve it in 10 ml of water. Under stirring, add 2.50 g of mercury dioxide powder into the solution of potassium iodate several times until the solution becomes dark yellow or a light red deposit appears. When the solution is slowly dissolved, stir and mix thoroughly, and then add the saturated solution of mercury dioxide. When a small amount of vermillion deposit no longer melts, stop dripping. Under stirring, slowly add the cooled solution of potassium ether into the mixture of mercury dichloride and potassium iodate, and dilute it to 100ml. Let it stand in the dark for 24h, pour out the supernate, and store it in a polythene bottle. Cover it tightly with a rubber stopper or a polythene cap, and store it in the dark. It can be stable for one month. 2. Mercuric iodide-kalium iodide-soda solution: Weigh 16.0 g of soda ash, dissolve in 50 ml of water, and cool to room temperature. Weigh out 7.0 g of potassium-iodate (Ki) and 10.0 g of mercury-iodate (HgI <2>), dissolve them in water, and then slowly add this solution into the 50 ml of the above-mentioned solution of the sodium-oh solution while stirring, and dilute it to 100 ml with water. Store in a polythene bottle, tightly closed with a rubber stopper or a polythene cap, and store in a dark place. The shelf life is 1 year. Another preparation method was to weigh 60g of potassium hydrogen, dissolve it in about 250ml of aqua-free water, and cool it to room temperature. In addition, weigh 20g of potassium iodate and dissolve it in 100ml of aqua-free water. While stirring, gradually add mercury dicloride-crystallized powder (about 10g). When a vermilion deposit is difficult to dissolve, add a saturated mercury dicloride-solution drop by drop and keep stirring. When a small amount of vermilion deposit is difficult to dissolve, stop adding the saturated mercury dicloride-solution drop by drop. The solution was then slowly injected into the cooled solution of the above-mentioned solution of the potash, stirred thoroughly as it was injected, diluted to 400ml with an aqua-free solution, and then allowed to stand overnight. Finally, the solution was transferred to a plastic bottle and stored at room temperature in the dark. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
What is the name of the Nessler reagent?
No other names were found for the Nessler reagent. Its English name was Nessler. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
Nessler's reagent and Na's solution
Nessler's reagent was a reagent used to determine the content of nitrogen and nitrogen in air and water using the principle of ultraviolet-visible spectrum. At room temperature, it was a slightly yellowish green transparent solution. As the exposure time increased, it gradually formed a yellow-brown deposit, and the solution gradually turned yellow. In a strong base solution, the reagent could react with Nessler's reagent (a strong base solution of potassium iodate) to form a yellow-brown colloid compound. The color had strong absorption in a wide range of frequencies. It was usually determined by light in the range of 410 - 425 run. It was the most commonly used reagent for analyzing the nitrogen in water. It was widely used in the laboratory and online measurement of nitrogen. He did not find any information related to the Na's solution, so he could not accurately explain its relationship with the Nessler's reagent. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
Is it useful to wear gloves for Nessler's reagent?
Nessler's reagent contained mercury and other components. Mercury was toxic, and if it came into contact with the skin, it needed to be washed in time. Wearing gloves could prevent the skin from coming into direct contact with the Nessler's reagent and prevent the harmful substances in the reagent from causing damage to the skin, so wearing gloves was useful. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
Nessler's reagent color ph range
When Nessler's reagent was used for the determination of nitrogen and nitrogen, the suitable range of color should be controlled between 11.8 - 13.4. When the pH-value was lower than 11.8, there would be no color reaction; when the pH-value was higher than 13.4, the solution would immediately become turbid, and the absorption could not be measured. However, some studies have shown that the optimal color development is at a pH11.8 - 12.4. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
How much is a bottle of Nessler's reagent
There were various prices for Nessler's reagent. For example, a 100ml bottle of Nessler's reagent cost 118.50 yuan, a 500ml bottle of Nessler's reagent cost 64.6 yuan, and some cost 9 yuan. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
The prepared Nessler's reagent is brownish-red.
Nessler's reagent was usually a slightly yellowish green transparent solution at room temperature. As the exposure time increased, it gradually formed a yellowish brown deposit, and the solution would gradually turn yellow. If the prepared Nessler's reagent was brownish-red, it might be due to improper operation during the preparation process or problems with the raw materials used. For example, in the preparation of mercuric chloride-potassium iotadium-potassium ether solution (HgCl2-KI-HF), if the amount of mercuric chloride-added or the method was not appropriate, it could lead to this situation. It was also possible that the reagent itself was contaminated or deteriorated. However, the specific reason still needed to be combined with the detailed operation steps in the configuration process, the purity of the reagents used, and other factors for a comprehensive analysis. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
The reason why the Nessler reagent was turbid
The turbid Nessler's reagent might be due to the large deviation in the preparation of the KNa tartrate and the Nessler's reagent, resulting in poor purity of the reagent. This was because some of the commercial analytical reagents used to prepare the reagents (such as potassium-Na tartarate, mercuric dioxide, etc.) often did not meet the requirements. Even the premium grade reagents produced by some regions and some manufacturers might not meet the experimental requirements, resulting in the preparation of turbid Nessler's reagents. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!