共找到 150 条与 光谱分析用试剂 四氢呋喃（不含稳定剂） 相关的标准，共 10 页
Chemical reagent—Tetrahydrofuran for spectroscopy analysis（inhibitor-free）
本标准规定了化学试剂 高效液相色谱用试剂 四氢呋喃的性状、规格、试验、检验规则和包装及标志。 本标准适用于化学试剂 高效液相色谱用试剂 四氢呋喃的检验。
Chemical reagent— Tetrahydrofuran for high performance liquid chromatography
This standard describes test conditions for the determination of the molecular weight distribution, number average molar mass Mn and weight average molar mass Mw of polymers that are soluble in THF (tetrahydrofuran) by gel permeation chromatography (GPC).#,,#
Gel permeation chromatography (GPC) - Part 1: Tetrahydrofuran (THF) as elution solvent
Gel permeation chromatography (GPC) - Part 1: Tetrahydrofuran (THF) as eluent (ISO 13885-1:2020)
Dieses Dokument legt die Ermittlung der Molmassenverteilung und der Molmassenmittelwerte Mn (Zahlenmittel) und Mw (Gewichtsmittel) von in Tetrahydrofuran (THF) löslichen Polymeren durch Gelpermeationschromatographie (GPC) fest.
Gel permeation chromatography (GPC) - Part 1: Tetrahydrofuran (THF) as eluent (ISO 13885-1:2020); German version EN ISO 13885-1:2021
This document specifies the determination of the molar-mass distribution and the average molar mass values Mn (number average) and Mw (weight average) of polymers that are soluble in tetrahydrofuran (THF) by gel permeation chromatography (GPC).NOTE Also known as size exclusion chromatography (SEC).Even though the chromatograms obtained show good repeatability, it is possible that this method cannot be used with certain polymer types because of specific interactions (e.g. adsorption) within the sample/eluent/column system.The conditions specified in this document are not applicable to the GPC analysis of polymer samples with Mw values greater than 106 g/mol and/or of polymers with elution limits outside the calibration range (see 7.6 and Annex C).This document includes no correction method (e.g. for the elimination of peak broadening. If absolute molar-mass values are required, an absolute method (e.g. membrane osmometry for Mn or light scattering for Mw) can be used.
Gel permeation chromatography (GPC) Part 1: Tetrahydrofuran (THF) as eluent
Die Norm legt das Verfahren und die Prufbedingungen zur Ermittlung der Molmassenverteilung und der Molmassenmittelwerte Mn (Zahlenmittel) und Mw (Gewichtsmittel) von in Tetrahydrofuran (THF) loslichen Polymeren durch Gelpermeationschromatographie (GPC)1) fest. Auf Grund von spezifischen Wechselwirkungen (z. B. Adsorption) in dem System aus zu analysierender Probe/Elutionsmittel/Trennmaterial ist es moglich, dass dieses Verfahren trotz guter Wiederholbarkeit der resultierenden Chromatogramme auf einzelne Polymere nicht angewandt werden kann. Das Prufverfahren ist kein Absolutverfahren, sondern erfordert eine Kalibrierung, die mit kommerziell verfugbaren, linear aufgebauten und nach unabhangigen Absolutverfahren charakterisierten Polystyrol-Standards durchgefuhrt wird. Die Resultate konnen daher fur alle chemisch anders aufgebauten Polymerproben nur als Relativwerte innerhalb gleichartig aufgebauter Probengruppen verwendet werden. Die Festlegungen dieser Norm sind nicht geeignet fur GPC-Analysen von Polymerproben mit Mw Werten groBer 10^6 g/mol und/oder Polymeren, deren Elutionsgrenzen auBerhalb des Kalibrierbereiches liegen. ImRahmendieserNormwerdenfernerkeineKorrekturverfahren(z.B.EliminationderPeakverbreiterung) durchgefuhrt.
Gel permeation chromatography (GPC) - Part 1: Tetrahydrofuran (THF) as elution solvent
Gel permeation chromatography (GPC) – Part 1: Tetrahydrofuran (THF) as eluent
This standard describes the determination of the molecular weight distribution, number-average molecular weight Mn and weight-average molecular weight ,Mw of polymers that are soluble in THF (tetrahydrofuran) by gel permeation chromatography (GPC). It is possible that, in spite of the good repeatability of the chromatograms obtained, this method cannot be used with certain polymer types because of specific interactions (e.g. adsorption) within the sample/eluent/column system. The method is not an absolute one and requires calibration with commercially available unbranched polystyrene standards that have been characterized by independent absolute methods. The results for samples of polymers other than polystyrene are therefore only comparable within groups of samples of the same type. The conditions specified in this standard are not suitable for the GPC analysis of polymer samples with Mw values greater than 10~6 g/mol (see Annex C). No correction methods (e.g. for the elimination of peak broadening) are included in this standard. If absolute molecular weight values are required, an absolute method (e.g. membrane osmometry for Mn or light scattering for Mw) shall be used.
Gel permeation chromatography (GPC) - Part 1: Tetrahydrofuran (THF) as elution solvent
该规范规定了使用凝胶渗透色谱法（GPC）测定溶于四氢呋喃（THF）的聚合物的摩尔质量分布及数均摩尔质量（Mn，数量平均值）和重均摩尔质量（Mw，重量平均值）的方法和试验条件。由于在待分析样品/洗脱剂/分离材料体系中存在特定的相互作用（例如吸附），尽管所得色谱图的重现性良好，该方法也可能不适用于某些聚合物。该试验方法并非绝对方法，而是需要进行校准，校准应使用市售的线性结构且通过独立的绝对方法表征的聚苯乙烯标准品进行。因此，结果仅可作为相对值，用于具有相同结构组成的聚合物样品组内。本规范的规定不适用于摩尔质量（Mw）大于10^6 g/mol的聚合物样品GPC分析，也不适用于洗脱界限超出校准范围的聚合物分析。本规范范围内不执行任何校正程序（例如消除峰展宽）。如果需要绝对摩尔质量值，则应采用绝对方法（例如用于Mn的膜渗透压法或用于Mw的光散射法）。
Gel permeation chromatography (GPC) - Part 1: Tetrahydrofuran (THF) as elution solvent
This document specifies the determination of the molar-mass distribution and the average molar mass values Mn (number average) and Mw (weight average) of polymers that are soluble in tetrahydrofuran (THF) by gel permeation chromatography (GPC). NOTE Also known as size exclusion chromatography (SEC). Even though the chromatograms obtained show good repeatability, it is possible that this method cannot be used with certain polymer types because of specific interactions (e.g. adsorption) within the sample/eluent/column system. The conditions specified in this document are not applicable to the GPC analysis of polymer samples with Mw values greater than 106 g/mol and/or of polymers with elution limits outside the calibration range (see 7.6 and Annex C). This document includes no correction method (e.g. for the elimination of peak broadening. If absolute molar-mass values are required, an absolute method (e.g. membrane osmometry for Mn or light scattering for Mw) can be used.
Gel permeation chromatography (GPC) — Part 1: Tetrahydrofuran (THF) as eluent
Gel permeation chromatography (GPC) - Part 1: Tetrahydrofuran (THF) as eluent
GPC Gel Permeation Chromatography. Part 1: Using Tetrahydrofuran (THF) as Eluent
Gel permeation chromatography(GPC) — Part 1: Tetrahydrofuran(THF) as eluent
Gel permeation chromatography (GPC) - Part 1 : tetrahydrofuran (THF) as eluent
