princess reagent
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.
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2026-03-28 19:09
Does the reagent blank mean no sample is added?
The reagent blank is that, except for the sample solution, all the other reagents and solutions are added according to the conventional method. That is, in the process of chemical analysis, when only the color reagent has color and has significant absorption of light at a specific wave length, and other components have no obvious absorption or absorption, a blank solution without the substance to be tested (that is, no sample is added) can be used as a reference. This blank solution is prepared under the same conditions as the color reaction. Therefore, no sample was added to the reagent blank.
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2026-03-17 20:06
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.
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2026-01-24 21:57
There is color in the blank when the Nessler reagent is used to measure the nitrogen nitrogen.
There may be the following reasons for the color of the blank in the Nessler's reagent:
1. ** The characteristics of the Nessler's reagent itself **: The Nessler's reagent is a slightly yellowish green transparent solution at room temperature. As the exposure time increases, it will gradually form a yellowish brown deposit, and the solution will gradually turn yellow. If the exposure time of the Nessler's reagent in the blank experiment was too long, it might cause color to appear.
2. ** Experiment operation factors **
- ** Cuvette problem **: If a 1cm cuvette is used, the blank value of the blank absorption is too high and is greater than 0.030, which may cause color to be seen. The first reason was the purity of the reagent, such as the reagent used containing an aminium salt (such as potassium-Na tartarate); the second reason was that the test water was contaminated and the introduction of an aminium salt.
- ** Inappropriate use of Nessler's reagent **: Nessler's reagent needs to be kept at room temperature before use, and it cannot be shaken before use. It should be used by absorbing the supernate. If this operation is not followed, the blank color may be affected.
3. ** Purity and contamination of reagents **
- [** Impurity in the reagent **: The order of adding the medicine in the preparation of the Nessler's reagent is different, and the phenomenon of different colors often occurs.]
- ** Contained **: If the experimental water or other reagents are contaminated with either nitrogen or nitrogen, the Nessler's reagent will also produce a color reaction in the blank experiment.
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2026-01-14 06:06
Princess, Princess, Princess
Here are a few recommended novels about princesses and princesses:
1. " The Story of a Foppish Princess Chasing Her Husband "-An ancient romance novel written by Jiang Xiaocen. The female protagonist, Luo Qinghuan, was a princess and her mother was the Eldest Princess. The plot involved a fight at home and chasing her husband.
2. In this ancient novel, the female protagonist was a proud princess.
3. The Moon is Bright for a Thousand Miles-An ancient drama that tells the story of the Buddha's son, Tamaraja, and the princess.
4. The story was about a girl who traveled back to ancient times to become a princess because of a bracelet. She faced obstacles and challenges from enemies.
5. " The Substitute Empress is also enchanting "-This novel tells the story of the female protagonist transmigrating into a princess and finally becoming an empress, showing the strength and wisdom of women.
I hope these recommendations will satisfy your interest in the novels of princesses and princesses.
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2024-12-28 18:11
The Princess and the Princess
Here are a few recommended novels about princesses and princesses:
1. " The Story of a Foppish Princess Chasing Her Husband "-An ancient romance novel written by Jiang Xiaocen. The female protagonist, Luo Qinghuan, was a princess and her mother was the Eldest Princess. The plot involved a fight at home and chasing her husband.
2. In this ancient novel, the female protagonist was a proud princess.
3. The Moon is Bright for a Thousand Miles-An ancient drama that tells the story of the Buddha's son, Tamaraja, and the princess.
4. The story was about a girl who traveled back to ancient times to become a princess because of a bracelet. She met a handsome man who truly loved her in ancient times, but at the same time, she faced many obstacles and enemies.
5. " The Princess is a Powerful Official "-The female protagonist of this book was a transmigrator who became a tigress princess and had four princesses under her.
I hope you like these recommended novels!
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2025-01-09 13:31
The Princess and the Princess
Here are a few recommended novels about princesses and princesses: " The Story of a Foppish Princess Chasing Her Husband "-An ancient romance novel written by Jiang Xiaocen. The female protagonist, Luo Qinghuan, was a princess and her mother was the Eldest Princess. The plot involved a fight at home and chasing her husband. 2. In this ancient novel, the female protagonist was a proud princess. 3. The Moon is Bright for a Thousand Miles-An ancient drama that tells the story of the Buddha's son, Tamaraja, and the princess.
1 answer
2025-01-07 17:14
Princess and Princess
Here are a few recommended novels about princesses and princesses: " The Story of a Foppish Princess Chasing Her Husband "-An ancient romance novel written by Jiang Xiaocen. The female protagonist, Luo Qinghuan, was a princess and her mother was the Eldest Princess. The plot involved a fight at home and chasing her husband. 2. In this ancient novel, the female protagonist was a tsundere princess. These novels were all set in ancient times and described the stories of princesses and princesses.
1 answer
2024-12-28 15:52
The Princess and the Princess
The following are a few recommended novels about the marriage of princesses. " Heqing Princess: The Iron-Blooded Husband's Palm " was a time-travel novel with a total of 150+ chapters. It had been completed. It told the story of a 15-year-old princess who was sent to the An Kingdom. The style of this novel was more exquisite, and it was suitable to read during a book shortage. 2. " The Heqing Princess Is Back,"" The General of the Nation and the Heqing Princess,"" The Heqing Princess Wants to Run Every Day," and " The Heqing Princess of Time Travel: Not Entering the Deep Palace Gate " were also recommended novels about the Heqing Princess. These novels all had princesses as the main characters. The plots were different and could be read according to one's personal preferences.
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2024-12-25 02:56
The female protagonist is a princess, a princess, and a princess.
I recommend a few super good novels! " Mr. President, Please Get a Divorce " was a modern romance novel written by Luo Qianqian. Seven years ago, the female protagonist died for the male protagonist. Seven years later, she returned with a cute baby and wanted to divorce him. However, the male protagonist did not want to let go again. There were elements such as a cute baby, sadism, and warmth. The female protagonist's counterattack and training of the CEO was super exciting.
" Delight in the Deep Palace " was an ancient travel novel on a sunny day. The female lead dressed up as an abandoned concubine and gave up. She had feelings for the prince. The relationship between the two was not wrong. The plot was novel and logical. The male and female leads flirted with each other. However, the first few chapters could be skipped.
" Princess Consort, please have some self-respect ", an ancient novel written by Man Man Qing Luo. It was a funny story about a woman chasing a man. The female protagonist's personality was different. Although the plot was old-fashioned, it was interesting. The author's writing was a little lacking, but it was still a good book for women. It was just that the updates were slow.
Princess Taming Horse, an ancient novel written by Yunhui. The female protagonist Yue Muyan's identity was changeable. Although the story was not very rigorous, the female protagonist was likable. In the chaotic world, the female protagonist did not have the intention to claim to be an emperor.
Crown Pet, the work of Princess Small Saber. The female protagonist, Lingxi, had been reborn and became the nemesis of men. With the detailed character information of the male and female protagonists, the female general's path to leveling up was extremely exciting.
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1 answer
2026-02-07 15:46
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