摘要:
The sensor membrane of an optical sensor for detection of O.sub.2, H.sub.2 O.sub.2, SO.sub.2 or halogenated hydrocarbons in a sample contains an indicator substance that is homogeneously immobilized in the polymer matrix of the sensor membrane and is, at least indirectly, in contact with the sample, changing at least one of its optical properties upon a change of the parameter to be measured. The indicator substance contains an inorganic salt of a transition metal complex with .alpha.-diimine ligands. The indicator substance is homogeneously distributed in the polymer matrix, which essentially consists of at least one substance belonging to the group of cellulose derivatives, polystyrenes, polytetrahydrofuranes, or their respective derivatives.
摘要翻译:用于检测样品中的O 2,H 2 O 2,SO 2或卤代烃的光学传感器的传感器膜包含均匀地固定在传感器膜的聚合物基质中的指示物质,并且至少间接地与样品接触, 在要测量的参数的变化时改变其光学特性中的至少一个。 指示物质含有与α-二亚胺配体的过渡金属络合物的无机盐。 指示剂物质均匀分布在聚合物基质中,其基本上由属于纤维素衍生物,聚苯乙烯,聚四氢呋喃或它们各自的衍生物的至少一种物质组成。
摘要:
In a sensor layer for quantitative determination of at least one chemical component in a gaseous or liquid sample medium containing a chromophore which is directly or indirectly responsive to the component being determined by changing its absorption spectrum, and a luminophore which is not responsive to the component being determined, where there is an at least partial overlap between the emission spectrum of the luminophore and the absorption spectrum of the chromophore, and where the energy transfer between luminophore and chromophore produces a measurable change in at least one luminescence characteristic of the luminophore, the luminophore L and the chromophore .GAMMA. are ionic substances with differing electrical charges, which are incorporated in a matrix material that is permeable to the chemical component being determined.
摘要:
In a sensor layer for quantitative determination of at least one chemical component in a gaseous or liquid sample medium containing a chromophore which is directly or indirectly responsive to the component being determined by changing its absorption spectrum, and a luminophore which is not responsive to the component being determined, where there is an at least partial overlap between the emission spectrum of the luminophore and the absorption spectrum of the chromophore, and where the energy transfer between luminophore and chromophore produces a measurable change in at least one luminescence characteristic of the luminophore, the luminophore L and the chromophore .GAMMA. are ionic substances with differing electrical charges, which are incorporated in a matrix material that is permeable to the chemical component being determined.
摘要:
The invention is based on the use of photoluminescent probes for intracellular sensing of oxygen, especially assaying intracellular oxygen concentration. The photoluminescent probe comprises a suspension of polymeric particles having an average diameter in the 20 nm to 100 nm range, formed from an amphiphilic cationic co-polymer which is oriented in the formed particle to provide a hydrophobic core and a hydrophilic shell. The probe includes a hydrophobic oxygen-sensitive photoluminescent dye such as Pt-tetrakis(pentafluorophenyl)porphine, PtPFPP embedded in the hydrophobic core of the particle, and the co-polymer includes quaternary ammonium groups which provide hydrophilic and cationic character to the particle shell. The photoluminescent probe, which in use is provided in the form of an aqueous suspension of probe, is incubated with live mammalian cells in a suitable growth medium for a period of time to allow the probe particles passively load into the cells. Oxygen can then be sensed by detecting a photoluminescent signal of the photoluminescent probe, which can be correlated with oxygen status, for example oxygen concentration or changes in oxygen concentration/levels, using existing techniques.
摘要:
The present invention relates to a device for determining carbon dioxide in a gaseous or liquid sample, comprising: a polymer matrix and an indicator embedded in the polymer matrix, wherein the indicator comprises a pH-sensitive dye and a lipophilic, metal cation-ionophore complex, and wherein an anion of the pH-sensitive dye and the metal cation-ionophore complex form an ion-pair which is soluble in the polymer matrix.
摘要:
The invention relates to a device for the temperature-compensated determination of chemical parameters, comprising: an optical temperature sensor which contains a temperature indicator that has a temperature-dependent afterglow time and/or luminous intensity and does not react with the surrounding medium; a chemical sensor which contains an indicator that is sensitive to a chemical parameter; means for stimulating the temperature indicator and the chemical indicator to luminesce; means for measuring the luminescence of the temperature indicator and of the chemical indicator; means for establishing an optical connection between indicator, excitation device and measuring equipment; means for detecting luminous radiation.
摘要:
The invention is based on the use of photoluminescent probes for intracellular sensing of oxygen, especially assaying intracellular oxygen concentration. The photoluminescent probe comprises a suspension of polymeric particles having an average diameter in the 20 nm to 100 nm range, formed from an amphiphilic cationic co-polymer which is oriented in the formed particle to provide a hydrophobic core and a hydrophilic shell. The probe includes a hydrophobic oxygen-sensitive photoluminescent dye such as Pt-tetrakis(pentafluorophenyl)porphine, PtPFPP embedded in the hydrophobic core of the particle, and the co-polymer includes quaternary ammonium groups which provide hydrophilic and cationic character to the particle shell. The photoluminescent probe, which in use is provided in the form of an aqueous suspension of probe, is incubated with live mammalian cells in a suitable growth medium for a period of time to allow the probe particles passively load into the cells. Oxygen can then be sensed by detecting a photoluminescent signal of the photoluminescent probe, which can be correlated with oxygen status, for example oxygen concentration or changes in oxygen concentration/levels, using existing techniques.
摘要:
The invention relates to a method for fluorimetrically or photometrically identifying gaseous substances or substances, which can be converted into a gaseous state, in samples. Decomposition reactions, optional purification steps, and detection can be carried out in a cell, which comprises one or more ion-permeable membranes, in a user-friendly and selective manner without losing any substances.
摘要:
Luminescent microparticles and nanoparticles are provided for use either as internal standards for referencing fluorescent signals, or as markers for detecting biomolecules. Luminescence dyes are incorporated in inert form into solid materials such that they are protected from the influence of chemical and biological compounds in aqueous sample constituents. The photophysical characteristics of the dyes (spectral characteristics, luminescence quantum efficiency, luminescence fading time and polarization) remain unaffected. The surface of the nanoparticles and microparticles can be provided with reactive surfaces in order to enable covalent coupling of biochemicals or to eliminate aggregation.
摘要:
A device for the transcutaneous, in vivo measurement of the concentration of at least one analyte in a living organism includes a catheter which can be introduced into the organism, and a luminescence indicator, which is immobilized on the catheter and which reacts to a change in the concentration of the at least one analyte to be measured with a change in at least one optical property. The luminescence indicator is transcutaneously connected to a source for providing an excitation radiation and a detector for detecting the measuring radiation. The luminescence indicator is immobilized on the outer circumference of the catheter, which is used to dispense a fluid medium, for example a medication, into the organism or to drain a body fluid.