样品实验方案
简要概述
1.添加 50 μL NaCl 标准品或测试样品
2.添加 50 μL Lithiumighty 520 工作溶液。
3.在室温孵育 5-10 分钟
4.检测 Ex/Em=490/525 nm 处的荧光
溶液配制
1.储备溶液配制
除非另有说明,否则所有未使用的储备溶液应分成一次性等分试样,并在制备后储存在-20°C。 避免反复冻融循环。
1.1制备 Lithiumighty? 520 储备溶液
将 100 μL DMSO(组分 D)添加到 SoNa 520 小瓶(组分 A)中。
注意:制作一份未使用的 Lithiumighty? 520 储备溶液等份并储存在 ≤ -20 oC 下。避光并避免重复冻融循环。
2.标准溶液配制
氯化钠标准品配制
将 350 μL 蒸馏水添加到 NaCl 标准样品瓶(组分 C)中,接下来,使用测定缓冲液(组分 B)稀释该 1M 储备溶液以制备 300 mM (LS1)。然后进行 1:2 连续稀释以获得连续稀释的锂标准品 (LS2 – LS7)。
3.工作溶液配制
准备 Lithiumighty 520 工作溶液
将 100 μL Lithiumighty? 520(组分 A)添加到 5 mL 测定缓冲液(组分 B)中。用箔纸覆盖工作溶液或将其置于黑暗中,以保护工作溶液免受光照。
注意:为了获得zui佳效果,该溶液应在制备后几小时内使用。
注意:5 mL 工作溶液足以进行 100 次测试。
操作步骤
表 1. 纯黑色 96 孔微孔板中锂标准品和测试样品的布局。
LS=锂标准品(LS1 - LS7,300 至 4.69 mM,2X 稀释); BL=空白对照; TS=测试样品
BL | BL | TS | TS |
LS1 | LS1 | ... | ... |
LS2 | LS2 | ... | ... |
LS3 | LS3 |
|
|
LS4 | LS4 |
|
|
LS5 | LS5 |
|
|
LS6 | LS6 |
|
|
LS7 | LS7 |
|
|
表2.每个孔的试剂组成。
孔 | 规格 | 试剂 |
LS1-LS7 | 50ul | 连续稀释液(300至4.69 mM) |
BL | 50ul | 测定缓冲液 |
TS | 50ul | 测试样本 |
1.根据表 1 和 2 中提供的布局制备锂标准品 (LS)、空白对照 (BL) 和测试样品 (TS)。对于 384 孔板,每孔使用 25 μL 试剂,而不是 50 μL。
2.向锂标准品、空白对照和测试样品的每个孔中添加 50 μL Lithiumighty? 520 工作溶液,使测定体积为 100 μL/孔。对于 384 孔板,请在每个孔中添加 25 μL,总体积为 50 μL/孔。
3.将反应物在室温下避光孵育 5 至 10 分钟。
4.使用荧光酶标仪在 Ex/Em = 490/525 nm(cutoff=515nm)处检测荧光增加。
数据分析
从空白标准孔获得的读数(RFU)用作阴性对照。 从其他标准的读数中减去该值,以获得基线校正值。 然后,绘制标准读数以获得标准曲线和方程。
图1.使用 Amplite 荧光法锂离子试剂盒在 96 孔黑色实心板中测量锂剂量反应。
参考文献
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