The manufacture of bottled soft drinks involves the use of flavoring emulsions. These emulsions must consist of droplets of uniform size that prevent Oswald ripening or agglomeration, both of which can cause unwanted “neck rings” within the bottle or cause “breaking” of the emulsion. The neck rings can be detected in the initial stages since the process is gradual.
尽管有许多用于确定乳液的平均液滴尺寸的方法，但它们不适合研究引起颈环的少量超大材料。与大小和计数单个粒子有关的方法适用于这种类型的分析，在此过程中，即使在此过程中也计数和大小。yabo214
This article demonstrates the capabilities of the指责器单粒子光学尺寸（SPO）系统used for determining oversized outlier particles in an emulsion.
指责器的概述
指责器确定主要种群低于1µm的乳液中的超大异常值颗粒。yabo214SPOS系统通过狭窄的测量室进行测量颗粒，并且具有高yabo214分辨率和灵敏度，可以检测从主要分布中消除的单个颗粒。分离颗粒的计数和大小的确定可以鉴定可能形成沉积物或颈环的乳液。yabo214
基于合并的传感器，指控器可用于从0.15到400µm的广泛工作范围。图1显示了由标准LE400光灭绝和散射传感器组成的系统，该系统可将样品自动稀释到最佳浓度以进行有效测量。
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Figure 1.Schematic of AccuSizer AD
Experimental
图2显示了以1：200比率预删除的样品的结果，总数为213,432颗粒/ml大于1µm。yabo214
The tail denotes 0.623% of the total sample volume. Since the volume of sample measured and the starting volume is known, multiple emulsions can be compared with overlaying sample runs as shown in Figure 3.
图4显示了六种不同的软饮料乳液的结果。还观察到了超大颗粒的大小和量的明显差异。yabo214accusizer spos单粒子计数方法允许放大x和y轴的清晰视图。
大量颗粒的乳液大小超过1μm，表明存在颈部环。yabo214乳液的稳定性可以通过计算超过1μm的颗粒数量，体积分数高于1 µm。yabo214
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Figure 2.预先稀释的风味乳液
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Figure 3.(a)Graph illustrating the comparison of multiple emulsions with overlaying sample(b)六种不同的软饮料乳液的结果
表2。Stability forecast
| Sample |
Particles /mL > 1 µm |
Volume Fraction > 1 µm |
Stability Forecast |
| 502 |
1.4 x 108 |
0.288% |
No Neck Ring/Sedimentation |
| 149 |
2.1 x 108 |
0.623％ |
No Neck Ring/Sedimentation |
| 471 |
1.2 x 108 |
3.600% |
边缘 |
| 703 |
6.2 x 108 |
7.989％ |
Neck Ring/Sedimentation |
| 623 |
2.6 x 108 |
8.189％ |
Neck Ring/Sedimentation |
| 258 |
5.4 x 108 |
29.031% |
Extreme Neck Ring |
结论
该指责器具有高灵敏度和分辨率，以计算超过1μm的粒子数量，这些数量与颈环的形成和乳液的稳定性成正比。
This information has been sourced, reviewed and adapted from materials provided by Entegris
有关此消息来源的更多信息，请访问Entegris