【求助】"Aristar grade" 是什么级别的试剂纯度啊，有知道的没？

Reagents
Aristar - these reagents are designed to meet the exacting requirements of today's analyst. Each product is carefully produced and rigorously tested. With impurity levels down to the PPB range, these reagents are suitable for both biochemical and electronic applications and ideal for all aspects of trace analysis.
SpectrosoL - the sophistication of modern spectroscopic techniques demands solvents, reagents and standards of high and consistent purity. The 'SpectrosoL' range is specially purified and packaged for use in a variety of spectroscopic applications.
Ultrapur - this top quality range consists of four acids manufactured by sub boiling distillation to ensure that impurities are in the sub parts per billion range. Each acid is supplied in a Teflon PFA bottle and is delivered complete with a lot analysis certificate.

Aristar grade是为迎合当前分析家们严苛的要求而生，生产过程严谨，测试严格，杂质含量低于ppb级。适用于生物化学和电子应用，且适用于各种痕量分析。
具体Aristar怎么来的，还没有找到。
感觉应该是个trademark

VWR International in the UK

Our pedigree in the UK goes back to a number of drug and chemical companies from the early 1700’s, who evolved in 1909 into the British Drug Houses company.

By the 1960’s laboratory reagents and chemicals had become the core business, so the drug ranges were sold to Glaxo and our business became BDH Chemicals, then subsequently BDH Ltd. Along the way, we had acquired a host of British instrument and apparatus companies, merged under the Baird & Tatlock name and these were integrated with BDH Ltd in 1987.

The BDH group was acquired by Merck in 1973, but the UK company name was not changed until 1990 when all the businesses were consolidated as Merck Ltd. The BDH name, with its famous AnalaR, ARISTAR, HiPerSolv and other chemicals, is still retained as a brand name.

On 1st October 2000, Merck Ltd transferred to Merck Eurolab Ltd, part of a European organisation formed to maximise the potential of Merck's Laboratory Supplies Business.

Finally, as of 1st January 2002, Merck Eurolab companies have now integrated further into a single global entity with the VWR organization, and our new company, in the UK, is known as VWR International Ltd.

The new organisation is built on the strong foundations of two market leaders - Merck Eurolab and VWR Scientific Products. These are the companies that have long defined the science of supply around the world.

由此可见，它确实是从一个brand name而来
楼主可以认为是ultra-pure grade

谢谢！！ 我google了半天也没g出来，不胜感激！

生物醇 特殊用途的