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制备酸盐/粉珠与氧阿帕酸加载的库尔库和应用作为色度pH标签的应用
Kwansuda Kongthong1, Nidanut Champoochana2, Kaewta Kaewtatip1
1Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand; Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
International journal of biological macromolecules
|April 10, 2025
概括
酸 (HAp) 增强的酸盐 (Alg) /粉珠与黄素被开发成一个pH响应指标. 这些增强的珠子表现出更好的稳定性,并通过改变颜色有效地信号食物变质.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 食品科学 食品科学 食品科学
背景情况:
- 酸珠广泛用于封装生物活性物质,但遭受化合物损失.
- 开发稳定和功能化的封装材料对于各种应用,包括食品质量监测至关重要.
研究的目的:
- 为了增强酸盐/粉珠的热和物理性能,使用酸 (HAp).
- 创建一个单步,pH响应的指标材料,用于检测食物腐烂,使用含有黄素的珠子.
- 评估HAp增强的酸盐/粉珠的性能,以监测包装鱼的新鲜度.
主要方法:
- 在酸盐 (Alg) /粉珠配方中加入酸 (HAp).
- 在单步过程中将黄素加载到HAp增强的Alg/粉珠中.
- 在不同的pH值下评估珠子的特性 (白度,晶度,膨胀率).
- 使用含有黄素的珠子,随着时间的推移监测包装鱼的新鲜度.
主要成果:
- 由于酸盐,粉和HAp之间的相互作用,HAp的添加改善了珠子的白度和结晶度.
- 10%w/v HAp 的/粉珠在不同的pH条件下表现出优越的稳定性和最小的膨胀比变化.
- 装满黄素的HAP增强珠子成功表明鱼类腐烂,在三天内从黄色变色为深棕色.
结论:
- 酸显著提高了酸盐/粉珠的稳定性和物理性能.
- 含有黄素,HAp增强的酸盐/粉珠作为一个有效的,单步色素pH响应的指标,用于食品腐烂.
- 开发的材料显示出在食品工业中用于质量控制的有希望的应用潜力.
相关概念视频
04:08Determining the pH of Salt Solutions
The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
02:56Buffers
A solution containing appreciable amounts of a weak conjugate acid-base pair is called a buffer solution, or a buffer. Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added. A solution of acetic acid and sodium acetate is an example of a buffer that consists of a weak acid and its salt: CH3COOH (aq) + CH3COONa (aq). An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride: NH3 (aq) + NH4Cl...
01:24pH
The potential of hydrogen (pH) is a measure of the acidity or basicity of a water-based solution determined by the concentration of hydronium ions (H3O+). In one liter of pure water at neutral pH, there are 1×10−7 moles of hydronium ions. However, the extensive range of hydronium ion concentrations present in water-based solutions makes measuring pH in moles cumbersome. Therefore, a pH scale was developed to convert moles of hydronium ions into the negative logarithm of the hydronium ion...
01:20Titration of a Weak Base with a Strong Acid
The titration curve of a weak base like ammonia with a strong acid like hydrochloric acid is the mirror image of the titration curve of a weak acid with a strong base.
Using the ICE table and substituting the Kb value, we calculate the initial pH of 50 mL of 0.1 M ammonia to be 11.11. Addition of 25 mL of 0.1 M hydrochloric acid to this solution of ammonia results in a buffer with an equal concentration of ammonia and ammonium ions. The pH of this buffer can be calculated by substituting these...
Using the ICE table and substituting the Kb value, we calculate the initial pH of 50 mL of 0.1 M ammonia to be 11.11. Addition of 25 mL of 0.1 M hydrochloric acid to this solution of ammonia results in a buffer with an equal concentration of ammonia and ammonium ions. The pH of this buffer can be calculated by substituting these...
01:18Titration of Polyprotic Base with a Strong Acid
The titration of a polyprotic base such as sodium carbonate with a strong acid such as hydrochloric acid results in two equivalence points on the titration curve. At the first equivalence point, the carbonate ions in the base are completely converted to bicarbonate ions. The second equivalence point corresponds to the complete conversion of bicarbonate ions to carbonic acid, which dissociates into carbon dioxide and water. The region before the first equivalence point corresponds to the...
01:30Titration of a Weak Acid with a Strong Base
In titrating a weak acid with a strong base, different calculation methods are applied at various stages. Initially, the pH of a weak acid like acetic acid is calculated using its dissociation constant (Ka) and an ICE table. Upon addition of a strong base such as sodium hydroxide, a buffer forms, and its pH is determined using the Henderson-Hasselbalch equation. As more base is added and the titration reaches the halfway point, the pH becomes equal to the pKa of the acid, indicating equal...