点击图片查看大图| 型号：Phaseprep | 品牌：Design Scientific | 加工定制：否 |
1.Solution preparation is the first operation that has to be performed for the vast majority of samples that are submitted to an analytical laboratory. Accurate solution preparation and documentation is, therefore, the foundation for the overall integrity of any analytical laboratory. The Design Scientific PhasePrep System is designed specifically for this purpose.
中文：对于大多数送到分析实验室的样品来说，溶液制备是第一步操作。准确的溶液制备和存贮是整个分析过程的基础。PhasePrep系统专门为此而设计。
Automatic Internal Standard Addition—Save Time, Reduce Costs
中文：全自动、内标法添加-节省时间、降低成本。
The most common way of obtaining high quantitative accuracy in HPLC, GC, AA, Mass Spectrometry and other techniques is to spike an unknown concentration of a sample with a known amount of another substance—commonly known as an internal standard. After the sample is analyzed, the response to the unknown concentration is compared to the internal standard and an accurate measurement of the concentration of the substance of interest is obtained.
中文：在高效液相、气相、AA、质谱色谱等技术中，获得高精确数量的最传统方式是根据已知浓度的物质来标定未知浓度的物质，也就是传统的内标法。未知物质的浓度可根据测试结果与浓度经过标准地、精确测量的物质相比较而得出。
The phasePrep Solution Preparation System saves labor while increasing accuracy when preparing solutions having an internal standard.
中文：Phaseprep溶液制备系统通过内部的标准既可以提高准确性，又能够减少劳动量。
The PhasePrep does this in five labor saving steps:
通过以下五个步骤来实现
样品转移，在瓶上打印标签。
Gravimetric Dilution: More Accurate than Volumetric1. Operator enters the sample number and his/her initials.
操作人员可输入个人姓名的首字母作样品编号。
2. A sample bottle is placed on the balance and the computer records the weight.
电脑能够测量、记录样品瓶重量。
3. Operator is prompted to add the appropriate amount of solute to the bottle.
操作人员将近似重量的溶质添加到样品瓶中。
4. The computer calculates the exact amount of solvent required.The solvent, with the internal standard dissolved, is added to the sample to obtain a dilution with a typical accuracy of 0.02%.
电脑可计算出所需溶剂的准确质量。将溶剂加入到样品瓶中所得到的稀释溶液精确度为0.02%。
5. The completed sample is removed and the printed sample label is affixed to the bottle.
样品转移，在瓶上打印标签。
按重量稀释，比按体积稀释更准确。
Solutions prepared using volumetric glassware are inherently inaccurate because of the density change of the solvent as the laboratory changes temperature. The magnitude of this error can be understood by referring to Table 1. Since Borosilicate (Pyrex™) glassware changes volume by only 0.013% over the same temperature span, the error caused by this volumetric change can easily be as high as 0.5%.
中文：使用玻璃量器制备的溶液有其固有的不准确性。因为随着温度的变化，溶剂密度也会相应变动。这种误差的严重性如表1所示。在相同的温度范围内，虽然硼硅玻璃器皿的体积变化仅为0.013%，但现实中该误差导致的溶液体积变化很容易达到0.5%。
Modern analytical instruments can routinely measure to an accuracy much better than 0.5%; however, in order to reach this potential, the solutions used in these techniques must be prepared to an accuracy three to ten times better (0.16% to 0.05%).
中文：现代分析仪器常规测量精度优于0.5%；然而，为了实现这种可能性，制备溶液时精度必须达到0.16% to 0.05%。
温度升高5℃时溶剂密度变化
溶剂种类 | 降低值（%） |
丙酮 | 0.758 |
乙酸 | 0.510 |
甲醇 | 0.827 |
乙醇 | 0.825 |
正丙醇 | 0.503 |
甲乙酮 | 0.658 |
甲苯 | 0.616 |
苯环 | 0.687 |
四氯化碳 | 0.401 |
氯仿 | 0.422 |
二氯甲烷 | 0.513 |
水 | 0.116 |
环己烷 | 0.706 |
二甲基亚砜 | 0.497 |
Why prepare solutions gravimetrically rather than volumetrically?
中文：为什么制备溶液时选用重量稀释法，而不是体积稀释法？
Safety is improved because the pouring and spillage associated with the volumetric method is reduced dramatically or eliminated.
中文：安全性提高。可大大减少或消除体积分析法中溶剂注入和溢出时的浪费。
The gravimetric method is inherently more accurate than the volumetric method because the temperature of the solvent can be ignored. The amount of solvent contained by a volumetric flask is a function of temperature—but the weight of the solvent is not affected by temperature.
中文：重量法本质上比体积法更准确。这是由于溶剂随温度的变化可被忽略。溶剂的体积是温度的参数，但是溶剂的质量却不受温度影响。
What are the costs of solvent mixing & solution preparation using the volumetric method vs the gravimetric method (PhasePrep II)?
中文：与体积法，采用重量法混合溶剂和制备溶液成本如何？
1. The cost of purchasing, replacing and cleaning of volumetric glassware.
中文：玻璃容量器皿的购买、替换与清洁费用。
With the PhasePrep II this is replaced by the cost of uncalibrated solvent containers.
中文：在第二代PhasePrep中只有溶剂容器（无标定刻度）的成本。
2. The cost of wasted solvent.
中文：浪费的溶剂成本
With the PhasePrep II, 135 ml or 653 ml of a solution can be prepared as easily as one liter. Solvent waste is minimized.
中文：在第二代PhasePrep中，制备135ml，653ml，以致1L溶液都非常容易，溶剂浪费减少。
3. The safety cost of handling solvents.
中文：处理溶剂时的安全措施费用。
The PhasePrep II is a closed system. The exposure to spilled solvents, broken glassware and harmful solvent vapors is reduced.
中文：第二代PhasePrep是全封闭系统。接触溢出溶剂、损毁的玻璃器皿和有害溶剂蒸汽的几率降低。
4. The cost of loosing laboratory integrity.
中文：实验完整性不稳定造成的成本。
This is the highest cost of all. What price can be put on mis-identifying a peak in a chromatogram because the solvent was not mixed accurately or a mislabeled solvent was used?
The PhasePrep II prepares mixtures to an accuracy of a few hundreths of one percent or better—every time. A label is also printed to document the preparation. This minimizes the cost of re-works, non-conformance investigations and thecostly delays that could result in not shipping finished product.
中文：这是最高的成本。什么能够弥补溶剂不准确混合或冒牌的溶剂被使用导致色谱峰值的错误标定产生的成本问题？第二代PhasePrep制备混合物时精确度达到几百分之一或更好。整个制备过程文档可被打印到标签上。以上这些可降低重复性工作、不可靠性研究结果和产品延误导致的成本。
溶剂精度 | ±2滴 |
重量精度 | 0.01g |
天平量程 | 0～8200g |
制备方法 | 100种 |
溶剂泵 | 8个 |
泵特点 | 无脉动、自启动、磁性耦合、齿轮泵、无旋转密封件 |
结构材料 | 特氟龙、316不锈钢、石墨 |
溶剂最大流速 | 500 ml/min |
电脑 | XP系统，触摸屏 |
电气 | 电压范围110-240V，频率50-60HZ,功率100W |
外形尺寸 | 27 cm（宽）×42 cm（长）×9.2 cm（高） |
优点：
1.安全性提高。可大大减少或消除体积分析法中溶剂注入和溢出时的浪费。
2.准确性提高。重量法本质上比体积法更准确。这是由于溶剂随温度的变化可被忽略。溶剂的体积是温度的参数，但是溶剂的质量却不受温度影响。
3.成本降低。通过以下五个步骤实现：
操作人员可输入个人姓名的首字母作样品编号。
电脑能够测量、记录样品瓶重量。
操作人员将近似重量的溶质添加到样品瓶中。
.
电脑可计算出所需溶剂的准确质量。将溶剂加入到样品瓶中所得到的稀释溶液精确度为0.02%。
自动打印标签。
