Poly(vinyl sulfate) potassium salt
Molecular Structure:
MDL:
--MFCD00081923
Molecular Formula:
C2nH3nKnSnO4n;[CH2CH(OSO3K)]n
Molecular Weight:
Alias:
聚乙烯硫酸鉀(PVSK
Product order:
Name |
Specifications |
Packing |
Price |
Delivery |
Poly(vinyl sulfate) potassium salt |
平均分子量 Mw ~170,000 |
5g |
RMB 4378 |
Consulting service |
Poly(vinyl sulfate) potassium salt |
平均分子量 Mw ~170,000 |
1g |
RMB 1188 |
Consulting service |
Character:
pvsk膠體滴定(colloid titration) 是一種簡單、快速、準(zhǔn)確的測定高分子聚合物電荷的方法。Potassium Polyvinyl Sulfate(聚乙烯硫酸鉀,PVSK)于水中可形成帶負(fù)電的膠體顆粒,Methyl Glycol Chitosan(MGC)在酸性水溶液中帶正電,利用電性中和的原理,負(fù)電膠體顆粒的會與正電膠體顆粒反應(yīng)達到電性中和。在適當(dāng)?shù)膒H條件下,此兩種膠體可完全反應(yīng)形成不溶性沉淀物。使用甲苯胺藍(Toluidine Blue,TB)為指示劑,與正電性膠體混合時,兩者之間沒有反應(yīng),TB維持藍色;當(dāng)懸浮液中膠體帶負(fù)電時,TB會吸附于膠體表面而現(xiàn)紫色。
滴定時,正電膠體可直接以PVSK溶液為滴定液,TB為指示劑進行滴定;對于負(fù)電荷膠體,可以直接以MGC滴定,或加入已知的過量的正電膠體,再以PVSK溶液對剩余的正電膠體進行反滴定。膠體滴定試劑——聚乙烯硫酸鉀(PVSK) 和乙二醇?xì)ぞ厶?GC),甲基乙二醇?xì)ぞ厶?MGC)
Quality Standard:
平均分子量 Mw ~170,000
Storage:
用途 膠體滴定試劑。
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