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異檸檬酸裂解酶(ICL)測試盒(紫外分光光度法)-ZIKER
蔗糖磷酸化酶(SP)測試盒(紫外分光光度法)-ZIKER
規格:50管/48樣 測試方法:紫外分光光度法
SP(EC2.4.1.7)主要存在于微生物和植物中,裂解葡萄糖苷鍵,催化葡萄糖基轉移到果糖、木糖、半乳糖和鼠李糖等,合成相應的葡萄糖基低聚糖。此外,SP還能催化氫醌合成熊果苷,具有*的美白效果,在化妝品工業中具有重要應用。
蔗糖磷酸化酶(SP)測試盒(紫外分光光度法)-ZIKER檢測原理:SP能夠以磷酸為受體,催化蔗糖產生1-磷酸葡萄糖,在葡萄糖磷酸變位酶催化下變位為6-磷酸葡萄糖,在6-磷酸葡萄糖脫氫酶作用下還原NADP+生成NADPH,導致340nm光吸收值增加。測定340nm吸光度增加速率,即可計算SP活性。
蔗糖磷酸化酶(SP)測試盒(紫外分光光度法)-ZIKER自備實驗用品及儀器:天平、低溫離心機、恒溫水浴鍋、紫外分光光度計、1 mL石英比色皿和蒸餾水。分光光度計則是通過測定被測物質在特定波長處或一定波長范圍內光的吸收度,對該物質進行定性和定量分析。在分光光度計中,將不同波長的光連續地照射到一定濃度的樣品溶液時,便可得到與眾不同波長相對應的吸收強度。如以波長(λ)為橫坐標,吸收強度(A)為縱坐標,就可繪出該物質的吸收光譜曲線。利用該曲線進行物質定性、定量的分析方法,稱為分光光度法,也稱為吸收光譜法。用紫外光源測定無色物質的方法,稱為紫外分光光度法;用可見光光源測定有色物質的方法,稱為可見光光度法。它們與比色法一樣,都以Beer-Lambert定律為基礎。 上述的紫外光區與可見光區是常用的。但分光光度法的應用光區包括紫外光區,可見光區,紅外光區。
常用的波長范圍為:
(1)200~400nm的紫外光區
(2)400~760nm的可見光區
(3)2.5~25μm(按波數計為4000cm<-1>~400cm<-1>)的紅外光區。
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