Storage and Handling of laboratory Standards

Laboratory standards play a crucial role in validation of analysis. It is just not possible to imagine any qualitative or quantitative determination which does not make use of a standard reference material at some stage of its method development and validation.

标准材料对其起源的可追溯性是使用材料的必要性预先确定，否则结果的可靠性也是可疑的。正是由于这个原因，标准参考材料非常昂贵，并且每次都不能使用分析确定。一种实用的方法是利用使用经过认证的参考资料制备的工作标准作为日常分析要求的基准。

Storage

The standard material needs to be preserved under its prescribed conditions otherwise due to degradation its assay and other characteristics will change over the storage period. Even under ideal storage conditions its stability is limited and there is a need to re-validate its parameters .The storage requirements are described here.

温度

Standards should be properly sealed and stored within the recommended storage temperature range. The container material should be inert towards the contents.

Humidity

湿度控制也是存储期间的基本要求。较高的湿度水平通常导致更快的降解。因此，含有标准的小瓶或瓶子应适当地密封并储存在除湿室内或内部干燥器中。

Light

A number of materials are sensitive to light and require protection from exposure to light. Such materials should be stored in amber coloured or aluminium foil wrapped vials or bottles. Light exposure of such materials should be minimized during weighing or volumetric transfer operations.

Handling of standards

第一个和最重要的要求是谨慎处理，因为溢出和破损可能导致实验室样本吞吐量的相当大的货币损失和下降。随着小瓶和瓶子通常，必须小心地处理这种容器，以防止意外损失。

Transfer of material

始终利用带有一次性尖端的微量化纤，用于转移标准。从未在下落者的帮助下拿出等分试样，因为这可能导致污染。同样，由于它导致污染，因此不应将过量的固体粉末返回原来的容器。确保牢固地对容器进行正确重新密封，以防止空气氧化或湿气进气在储存期上损坏。

Use clean spatulas

总是使用清洁刮刀拿出材料from vials. It is advisable to wear disposable gloves when handling standards.

Handling of standards stored under sub-ambient temperatures

Standards stored under sub-ambient conditions need special handling and care. Removal from实验室冰箱需要足够的护理以防止所需标准或任何其他材料的溢出。从较低温度移除的情况下，水冷凝可以使容器湿滑，因此需要额外的搬运。应该提供进一步充分的时间，以允许其获得环境实验室温度，从而可以正确地测量体积，并且可以避免由于温度变化引起的误差。

Care during handling and storage in addition to traceability to the source are equally important for standard reference materials. The main objective is to avoid undue material loss, degradation during storage and prevent contamination from other materials. Only when such precautions are taken you will be able to guarantee the validity of your results.