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Molecular Formula:
Molecular Weight:
Alias:
Product order:
Name
Specifications
Packing
Price
Delivery
HF254 60
250g
RMB 74.8
Consulting service
GF254 60
250g
RMB 74.8
Consulting service
H60
250g
RMB 63.8
Consulting service
G60
250g
RMB 63.8
Consulting service
Character:
本品為白色、高純度并具有規(guī)定的孔容、比表面積和孔隙分布及一定粒度分布的試劑硅膠。不含石膏和有機(jī)黏合劑的薄層色譜固定相。物理性質(zhì)為白色粉末,具有不同微空結(jié)構(gòu)和表面積。能吸收空氣中的水分。溶于氫氟酸和熱堿溶液,不溶于水和其他無(wú)機(jī)酸。其吸附性能是由表面的硅醇基所引起的,可與極性化合物等形成氫鍵而吸附。它可以作吸附色譜的固定相,含水后則可作為分配色譜的固定相。
Quality Standard:
型 號(hào) H HF254 G GF254 典型數(shù)值G 典型數(shù)值H
煅石膏%(CaSO4.1/2H2O),% --- --- 12.0- 12.0- 12.9 ---
14.0 14.0
氯化物(以Cl計(jì)),% ≤0.02 ≤0.02 ≤0.02 ≤0.02 0.017 0.015
鐵(Fe),% ≤0.015 ≤0.015 ≤0.015 ≤0.020 0.003 0.003
pH(100g/L水懸浮液) 6.0-7.0 6.0-7.0 6.0-7.0 6.0-7.0 6.4 6.3
38um篩殘余物,% ≤4.0 ≤4.0 ≤4.0 ≤4.0 2.4 2.3
活度 三色分開(kāi) 三色分開(kāi) 三色分開(kāi) 三色分開(kāi) 三色分開(kāi) 三色分開(kāi)
備注:“三色”指二甲基黃、蘇丹紅、靛藍(lán)。
Storage:
用途 薄層層析硅膠被廣泛應(yīng)用于各種天然合成物質(zhì)的分析和分離。大量用在醫(yī)藥、農(nóng)藥、中草藥、有機(jī)化工產(chǎn)品、石油化工產(chǎn)品以及糧食、食品的主要成分或微量雜質(zhì)的定性與定量分析和某些物質(zhì)的提純制備。薄層H型也可作為干洗劑載體。
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