Method for crystallization of a weakly acidic and/or weakly basic compound
    4.
    发明申请
    Method for crystallization of a weakly acidic and/or weakly basic compound 有权
    弱酸性和/或弱碱性化合物的结晶方法

    公开(公告)号:US20070044705A1

    公开(公告)日:2007-03-01

    申请号:US11511936

    申请日:2006-08-28

    IPC分类号: H01L21/322

    CPC分类号: B01D9/0054

    摘要: A method for crystallization of a weakly acidic and/or weakly basic compound having an uncharged form and at least one charged form comprises the steps of: a) providing a solution of said compound in a solvent having an initial pH-value and an initial total concentration of said compound, said initial pH-value being chosen such that the compound is present in said solution predominantly in said charged form, said initial total concentration being chosen larger than the intrinsic solubility of said uncharged form; b) gradually changing the pH-value of said solution in a direction that leads to a decrease of said compound's solubility until reaching a predetermined target pH-value at which said solution is in a substantially saturated state and the concentration of said uncharged form is substantially equal to said intrinsic solubility thereof; and c) maintaining said solution in a substantially saturated state while allowing formation of crystals of said compound.

    摘要翻译: 用于结晶具有不带电荷形式和至少一种带电形式的弱酸性和/或弱碱性化合物的方法包括以下步骤:a)将所述化合物的溶液提供在具有初始pH值和初始总量的溶剂中 所述化合物的浓度,所述初始pH值被选择为使得化合物主要以所述带电形式存在于所述溶液中,所述初始总浓度选择为大于所述不带电形式的固有溶解度; b)在导致所述化合物溶解度降低的方向上逐渐改变所述溶液的pH值,直到达到所述溶液处于基本饱和状态的预定目标pH值,并且所述不带电形式的浓度基本上 等于其内在溶解度; 和c)将所述溶液保持在基本饱和状态,同时允许所述化合物的晶体形成。

    Method for estimating the number of nuclei of a preselected isotope in a molecular species from and NMR spectrum
    5.
    发明申请
    Method for estimating the number of nuclei of a preselected isotope in a molecular species from and NMR spectrum 有权
    用于估计分子物质中的预选同位素核和核磁共振光谱的核数的方法

    公开(公告)号:US20050114043A1

    公开(公告)日:2005-05-26

    申请号:US10983077

    申请日:2004-11-05

    申请人: Alfred Ross

    发明人: Alfred Ross

    CPC分类号: G01R33/4625 G01N24/08

    摘要: A method for estimating the number of nuclei of a preselected isotope in a molecular species starts with an NMR spectrum of a sample containing said molecular species as a predominant substance, said NMR spectrum comprising a plurality of signal peaks corresponding to said nuclei. By applying inclusion and ordering criteria one obtains a set of ordered signal peaks, the integration of which leads to a set of ordered integrals. Nested outer and inner iteration cycles are carried out, wherein for each cycle a trial number of nuclei is assigned to one of said ordered integrals whilst the other ordered integrals are rescaled accordingly and rounded to the next integer value, so as to yield a candidate total number of nuclei. An estimated total number of nuclei is obtained by taking the lowest one from the plurality of candidate total numbers of nuclei that have the highest number of occurrences.

    摘要翻译: 用于估计分子物种中预选同位素的核数的方法从包含所述分子物质作为主要物质的样品的NMR光谱开始,所述NMR光谱包括对应于所述核的多个信号峰。 通过应用包含和排序标准,可以获得一组有序信号峰值,其集成导致一组有序积分。 执行嵌套的外部和内部迭代循环,其中对于每个周期,将试验数量的核分配给所述有序积分之一,同时将其他有序积分相应地重新缩放,并舍入到下一个整数值,以产生候选总数 核数 通过从具有最高发生次数的多个核的候选总数中获取最低的核来获得估计的核数总数。