NIBSC01/506 Botulinum type F antitoxin, equine 01/506

NIBSC01/506 Botulinum type F antitoxin, equine 01/506

Product descriptionBotulinum type F antitoxin, equineF型肉毒杆菌抗毒素,马Product number01/506 NIBSC01/506CategoryVaccines Botulinum/马F型肉毒杆菌抗毒素标准物质KeywordsClostridium; botulinum; botulinus; botulisme; botulino; tosina b[……]

继续阅读

NIBSC01/506 Botulinum type F antitoxin, equine 01/506 Read More »

直接配制法要求化学试剂纯度较高的原因

直接配制法要求化学试剂纯度较高的原因

直接配制法要求化学试剂纯度较高的原因主要有以下几点:

1、准确性要求:直接配制法是通过将基准物质溶解后定容至一定体积来得到所需浓度的标准溶液。如果化学试剂的纯度不高,含有杂质,那么这些杂质也会溶解在溶液中,导致所配制的标准溶液浓度不准确。因此,为了保证所配制标准溶液的准确性,必须使用纯度较高的化学试剂。

2、稳定性要求:直接配制法要求所使用的化学试剂性质稳定,不易潮解、风化等。如果试剂纯度不高,可能会含有一些易分解或易吸潮的成分,导致在配制过程中发生变化,从而影响标准溶液的稳定性。

3、重现性要求:在实验室中,经常需要重复配制和使用[……]

继续阅读

直接配制法要求化学试剂纯度较高的原因 Read More »

80226-62-6 N-磺酰氨甲酰膝沟藻毒素3标准品C3简介

N-Sulfocarbamoylgonyautoxin-3 (C2)   N-磺酰氨甲酰膝沟藻毒素3 (C2)

CAS registry No.: 80226-62-6 (free base)

InChIKey: OKSSKVHGKYJNLL-LJRZAWCWSA-N

Molecular formula: C10H17N7O11S2

Molecular weight: 475.4 g/mol

80226-62-6 N-磺酰氨甲酰膝沟藻毒素3标准品C3 PSP是一类剧毒的含氯杂环有机化合物,根据基团的相似性,可分为三类:氨甲酰基类毒素(carbamoyl toxin[……]

继续阅读

80226-62-6 N-磺酰氨甲酰膝沟藻毒素3标准品C3简介 Read More »

265996-93-8原多甲藻酸毒素3标准品AZA3简介

Azaspiracid-3   原多甲藻酸毒素3 AZA3

CAS registry No.: 265996-93-8

Molecular formula: C46H69NO12

Formula molecular weight: 828.05 g/mol

[M+H]+: monoisotopic mass: 828.4893 Da

265996-93-8原多甲藻酸毒素3标准品AZA3 AZA的生物起源还没有明确定论。据报道,原多甲藻属(Protoperidinium)的某些种类能够产生AZA。原多甲藻属在分类学上隶属于甲藻门(Dinophyta)、横裂甲藻纲(D[……]

继续阅读

265996-93-8原多甲藻酸毒素3标准品AZA3简介 Read More »

80173-30-4 N-磺酰氨甲酰膝沟藻毒素2标准品C2简介

N-Sulfocarbamoylgonyautoxin-2 (C1)   N-磺酰氨甲酰膝沟藻毒素2(C1)

CAS registry No.: 80173-30-4 (free base)

InChIKey: OKSSKVHGKYJNLL-XXKOCQOQSA-N

Molecular formula: C10H17N7O11S2

Molecular weight: 475.4 g/mol

麻痹性贝类毒素是毒性很强的毒素之一,其毒性与河豚毒素相当。它由20多种结构不同的甲藻产生的毒素组成,这些甲藻既可在热带水域又可在温带水域生长。这种毒素溶于水且对酸稳定,在碱性条[……]

继续阅读

80173-30-4 N-磺酰氨甲酰膝沟藻毒素2标准品C2简介 Read More »

NIBSC99/720 Chorionic Gonadotrophin, alpha subunit, Human (purified) 99/720

NIBSC99/720 Chorionic Gonadotrophin, alpha subunit, Human (purified) 99/720

Product descriptionChorionic Gonadotrophin, alpha subunit, Human (purified)/人绒毛膜促性腺激素α亚基国际标准物质hCG-αProduct number99/720 NIBSC99/720CategoryDiagnostics Protein Hormones and Endocrine Produ[……]

继续阅读

NIBSC99/720 Chorionic Gonadotrophin, alpha subunit, Human (purified) 99/720 Read More »

NIBSC00/500 Botulinum Type A-E Antitoxin, Human Serum 00/500

NIBSC00/500 Botulinum Type A-E Antitoxin, Human Serum 00/500

Product descriptionBotulinum Type A-E Antitoxin, Human Serum/人血清中肉毒杆菌A-E型标准物质BoNTProduct number00/500 NIBSC00/500CategoryVaccines Botulinum/肉毒杆菌抗毒素国际标准品BoNT,来源人血清KeywordsClostridium; botulinum; botulinu[……]

继续阅读

NIBSC00/500 Botulinum Type A-E Antitoxin, Human Serum 00/500 Read More »

NIBSC99/708 Chorionic Gonadatrophin, beta core fragment, Human WHO Reference Reagent 99/708

NIBSC99/708 Chorionic Gonadatrophin, beta core fragment, Human WHO Reference Reagent 99/708

Product descriptionChorionic Gonadatrophin, beta core fragment, Human WHO Reference Reagent/绒毛膜促性腺激hCG,β核心片段,人Product number99/708 NIBSC99/708CategoryDiagnostics Protei[……]

继续阅读

NIBSC99/708 Chorionic Gonadatrophin, beta core fragment, Human WHO Reference Reagent 99/708 Read More »

NIBSC99/692 Chorionic Gonadotrophin, nicked beta subunit, Human WHO Reference Reagent 99/692

NIBSC99/692 Chorionic Gonadotrophin, nicked beta subunit, Human WHO Reference Reagent 99/692

Product descriptionChorionic Gonadotrophin, nicked beta subunit, Human WHO Reference Reagent/绒毛膜促性腺激hCG,缺口β亚单位,人Product number99/692 NIBSC99/692CategoryDiagnostics Protei[……]

继续阅读

NIBSC99/692 Chorionic Gonadotrophin, nicked beta subunit, Human WHO Reference Reagent 99/692 Read More »

NIBSC99/688 Chorionic Gonadatrophin, intact, Human. WHO Reference Reagent 99/688

NIBSC99/688 Chorionic Gonadatrophin, intact, Human. WHO Reference Reagent 99/688

Product descriptionChorionic Gonadatrophin, intact, Human. WHO Reference Reagent/绒毛膜促性腺激hCG,完整,人Product number99/688 NIBSC99/688CategoryDiagnostics Protein Hormones and Endocrine Prod[……]

继续阅读

NIBSC99/688 Chorionic Gonadatrophin, intact, Human. WHO Reference Reagent 99/688 Read More »