Forensically acceptable determinations of gestational fetal exposure to
drugs and other chemical agents
    34.
    发明授权
    Forensically acceptable determinations of gestational fetal exposure to drugs and other chemical agents 失效
    妊娠胎儿暴露于药物和其他化学药剂的法医学上可接受的测定

    公开(公告)号:US5326708A

    公开(公告)日:1994-07-05

    申请号:US115902

    申请日:1993-09-01

    申请人: Douglas E. Lewis

    发明人: Douglas E. Lewis

    IPC分类号: G01N33/94 G01N33/00

    摘要: Methods for collecting neonatal meconium samples, preparing meconium specimens for testing and for chemically analyzing neonatal meconium samples to determine their chemical composition are provided. A novel extraction method is employed in accordance with the invention to provide a non-aqueous, concentrated "cocktail" meconium extract containing substantially all of many possible target analytes in a single extraction step. Preliminary screening by fluorescence polarization immunoassay methods may be performed on the cocktail extract to qualitatively determine the presence of the target analytes in the meconium sample. If a positive preliminary result is obtained, new and improved quantitative GC/MS confirmatory procedures are provided by this invention to unequivocally identify and quantitate the amount of target analyte present in the sample in terms of nanograms of analyte per gram of meconium tested.

    摘要翻译: 提供了收集新生儿胎粪样品,制备胎粪标本进行测试和化学分析新生儿胎粪样品以确定其化学成分的方法。 根据本发明采用新的提取方法,以在单次提取步骤中提供含有基本上所有许多可能的目标分析物的非水性浓缩“混合物”胎粪提取物。 通过荧光偏振免疫测定方法的初步筛选可以在混合物提取物上进行,以定性测定胎粪样品中目标分析物的存在。 如果获得了积极的初步结果,本发明提供了新的和改进的定量GC / MS确认程序,以每克测得的胎粪的纳克分析物来明确和定量存在于样品中的目标分析物的量。

    Method and reagents for detecting amphetamine and/or D-methamphetamine
in biological samples
    35.
    发明授权
    Method and reagents for detecting amphetamine and/or D-methamphetamine in biological samples 失效
    用于检测生物样品中苯丙胺和/或D-甲基苯丙胺的方法和试剂

    公开(公告)号:US5262333A

    公开(公告)日:1993-11-16

    申请号:US898238

    申请日:1992-06-12

    IPC分类号: G01N33/542 G01N33/94

    摘要: This disclosure relates to a method and reagents for determining amphetamine and d-methamphetamine in a biological fluid, such as urine. In particular, this disclosure relates to improvements in a fluorescence polarization immunoassay procedure for determining the presence of amphetamine and d-methamphetamine in a single assay and to a novel class of tracer compounds employed as reagents in such procedures. The procedure described includes pretreatment of the biological sample to eliminate cross reactants such as .beta.-hydroxyphenethylamine by preincubating the sample solely with an aqueous periodate solution having a pH from about 4.0 to about 7.5 without adjustment to an alkaline pH, and contacting the sample with riboflavin binding protein to reduce interference from fluorescent components in the sample. The procedure also maintains the cross reactivity of the immunoassay for tyramine at about 0.4% and for 1-methamphetamine below about 5.1% and eliminates the necessity of using controlled substances as starting materials.

    摘要翻译: 本公开涉及用于在生物流体例如尿中测定苯丙胺和d-甲基苯丙胺的方法和试剂。 特别地,本公开涉及在单次测定中用于确定苯丙胺和d-甲基苯丙胺的存在的荧光偏振免疫测定方法的改进,以及在这种方法中用作试剂的新型示踪剂化合物。 所述方法包括通过预先处理生物样品以消除交叉反应物例如β-羟基苯乙胺,通过仅用pH约4.0至约7.5的高碘酸钠溶液预温育样品,而不调节至碱性pH,并将样品与核黄素接触 结合蛋白以减少样品中荧光成分的干扰。 该方法还保持酪胺的免疫测定在约0.4%的交叉反应性和低于约5.1%的1-甲基苯丙胺,并且不需要使用受控物质作为起始原料。

    Homogeneous enzyme assay for antibodies
    40.
    发明授权
    Homogeneous enzyme assay for antibodies 失效
    抗体均质酶检测

    公开(公告)号:US4190496A

    公开(公告)日:1980-02-26

    申请号:US802683

    申请日:1977-06-02

    摘要: Novel biological assay method for determining the presence of a specific organic material by employing a modified enzyme for amplification. By employing receptors specific for one or a group of materials (hereinafter referred to as "ligands") and binding an enzyme to the ligand or ligand counterfeit to provide an "enzyme-bound-ligand", an extremely sensitive method is provided for assaying for ligands. The receptor when bound to the enzyme-bound-ligand substantially inhibits enzymatic activity, providing for different catalytic efficiencies of enzyme-bound-ligand and enzyme-bound-ligand combined with receptor.The receptor, ligand and enzyme-bound-ligand are combined in an arbitrary order and the effect of the presence of ligand on enzymatic activity determined. Various protocols may be used for assaying for enzymatic activity and relating the result to the amount of ligand present.The subject method may also be used for determining receptors, employing the same procedure, except for not including receptor as a reagent.

    摘要翻译: 用于通过使用经修饰的酶进行扩增来确定特定有机材料的存在的新型生物测定方法。 通过使用对一种或一组材料(以下称为“配体”)特异性的受体并将酶与配体或配体假冒结合以提供“酶结合 - 配体”,提供极其灵敏的方法用于测定 配体。 当与酶结合的配体结合时的受体基本上抑制酶活性,提供与受体结合的酶结合配体和酶结合配体的不同催化效率。 受体,配体和酶结合配体以任意顺序组合,并确定配体存在对酶活性的影响。 可以使用各种方案来测定酶活性并将结果与​​存在的配体的量相关联。 本方法也可以用于确定受体,采用相同的方法,但不包括受体作为试剂。