Detection of peroxidase activity in milk or milk products
    2.
    发明授权
    Detection of peroxidase activity in milk or milk products 失效
    检测牛奶或奶制品中的过氧化物酶活性

    公开(公告)号:US07001741B1

    公开(公告)日:2006-02-21

    申请号:US10148267

    申请日:2000-11-13

    IPC分类号: C12Q1/28

    CPC分类号: C12Q1/28 C12Q2326/12

    摘要: The invention relates to an agent and a method for the dry chemical detection of lactoperoxidase in milk or dairy products. The method according to the invention is characterized by rapid execution thereof and said method has a high degree of sensitivity. The high detection sensitivity is achieved by adding iodide ions to the usual reagents.

    摘要翻译: 本发明涉及乳或乳制品中乳过氧化物酶的干化学检测试剂和方法。 根据本发明的方法的特征在于其快速执行,并且所述方法具有高度的灵敏度。 通过向通常的试剂中加入碘离子可实现高检测灵敏度。

    Method and agent for determining total water hardness
    3.
    发明授权
    Method and agent for determining total water hardness 有权
    测定总水硬度的方法和试剂

    公开(公告)号:US06994973B2

    公开(公告)日:2006-02-07

    申请号:US10433839

    申请日:2001-08-30

    IPC分类号: C12Q1/68

    CPC分类号: G01N33/1853 G01N31/22

    摘要: The invention relates to a dry chemical method and a test strip for determining calcium and magnesium in aqueous samples. Said test strip contains o-cresolphthalein complex (o-CPC; CAS Registry No. 2411-89-4) as a colour-causing reagent in a buffer system with a pH value of below 8.5. By using in particular an aqueous ethanolic imidazole buffer with a pH value of 6.75, conditions can be set up in such a way that the o-CPC has an identical molar sensitivity with respect to Ca and Mg. The total water hardness of aqueous samples can thus be easily determined.

    摘要翻译: 本发明涉及一种用于测定含水样品中钙和镁的干化学方法和测试条。 所述测试条含有pH值低于8.5的缓冲系统中的作为引诱剂的邻甲酚酞复合物(o-CPC; CAS登记号2411-89-4)。 通过特别使用pH值为6.75的含水乙醇咪唑缓冲液,可以使得o-CPC相对于Ca和Mg具有相同的摩尔灵敏度的条件。 因此可以容易地确定含水样品的总水硬度。

    Karl-Fischer reagent and process for the determination of water
    4.
    发明授权
    Karl-Fischer reagent and process for the determination of water 失效
    卡尔费休试剂和测定水的方法

    公开(公告)号:US4703014A

    公开(公告)日:1987-10-27

    申请号:US706225

    申请日:1985-02-27

    IPC分类号: G01N31/16 G01N33/18

    CPC分类号: G01N31/168

    摘要: A Karl-Fischer reagent useful in a process for the determination of water contains a pyridine substitute, sulfur dioxide and iodine. As the pyridine substitute, the reagent contains at least one compound from the group comprising the guanidines, amidines, imido-esters, isoureas, cyanamide, or salts thereof with a weak organic acid.

    摘要翻译: 用于测定水的方法中的卡尔费休试剂包含吡啶替代物,二氧化硫和碘。 作为吡啶替代物,试剂含有至少一种包含胍,脒,亚氨基酯,异脲,氰胺或其盐与弱有机酸的化合物。

    Pyridine-free Karl Fischer reagent useful in determining water
    5.
    发明授权
    Pyridine-free Karl Fischer reagent useful in determining water 失效
    不含吡啶的卡尔费休试剂可用于测定水分

    公开(公告)号:US4416997A

    公开(公告)日:1983-11-22

    申请号:US333100

    申请日:1981-12-21

    CPC分类号: G01N31/168

    摘要: An essentially pyridine-free Karl Fischer reagent useful in the determination of water, comprises a dissolving agent containing sulfur dioxide and a pyridine substitute in a Karl Fischer solvent, and a titrating agent containing iodine in a Karl Fischer solvent, wherein the pyridine substitute is an alkali or alkaline earth metal benzoate or ammonia, and the reagent is essentially free of pyridine.

    摘要翻译: 可用于测定水中的基本上不含吡啶的卡尔费休试剂包含在卡尔费休溶剂中含有二氧化硫和吡啶替代物的溶解剂和在卡尔费休溶剂中含有碘的滴定剂,其中吡啶代替物为 碱金属或碱土金属的苯甲酸盐或氨,试剂基本上不含吡啶。

    Pyridine-free Karl-Fischer reagent and a process for the determination
of water therewith
    7.
    发明授权
    Pyridine-free Karl-Fischer reagent and a process for the determination of water therewith 失效
    不含吡啶的卡尔费休试剂及其测定方法

    公开(公告)号:US4748126A

    公开(公告)日:1988-05-31

    申请号:US245405

    申请日:1981-03-19

    CPC分类号: G01N31/168

    摘要: A pyridine-free Karl-Fischer reagent for the determination of water which comprises (a) a solvent solution containing sulfur dioxide and an amine in a Karl-Fischer reagent solvent, the amine being functionally equivalent to pyridine in a Karl-Fischer reagent, and (b) a titrating agent containing iodine in a Karl-Fischer solvent; the molar ratio of amine to sulfur dioxide being about 2:1 to about 1:1 and the reagent being essentially free of pyridine.

    摘要翻译: 一种用于测定水的不含吡啶的卡尔费休试剂,其包括(a)在卡尔费休试剂溶剂中含有二氧化硫和胺的溶剂溶液,该胺在功能上等同于卡尔费休试剂中的吡啶,以及 (b)在卡尔费休溶剂中含有碘的滴定剂; 胺与二氧化硫的摩尔比为约2:1至约1:1,试剂基本上不含吡啶。

    Karl Fischer reagent and method for determining water by means of this
reagent
    8.
    发明授权
    Karl Fischer reagent and method for determining water by means of this reagent 失效
    卡尔费休试剂和通过该试剂测定水的方法

    公开(公告)号:US4647542A

    公开(公告)日:1987-03-03

    申请号:US716439

    申请日:1985-03-27

    IPC分类号: G01N31/00 G01N31/16 G01N33/18

    CPC分类号: G01N31/168

    摘要: A new Karl Fischer reagent contains as a pyridine substitute at least one compound of the general formula ##STR1## in which R.sup.1 and R.sup.2, which can be identical or different, =hydrogen or alkyl having 1-6 C atoms,R.sup.3 =alkyl having 1-6 C atoms,X=alkali metal ion or one equivalent of an alkaline earth metal ion,n=0 or a number from 1 to 4 andm=a number from 1 to 4.

    摘要翻译: 一种新的卡尔费休试剂含有至少一种通式为“IMAGE”的化合物作为吡啶替代物,其中可以相同或不同的R 1和R 2为氢或具有1-6个C原子的烷基,R 3 =具有1个 -6个C原子,X =碱金属离子或1当量的碱土金属离子,n = 0或1至4的数,m = 1至4的数。