standard curve

8
Standard Curve With Microsoft Excel Miss Huichun 2011/7/6 at TCU

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Page 1: Standard curve

Standard Curve

With Microsoft Excel

Miss Huichun2011/7/6 at TCU

Page 2: Standard curve

Step 1: Key in Data• 輸入已知濃度樣品之吸光值數據,製作表格。– 利用『公式』減少重覆的計算

Page 3: Standard curve

Step 2: Make the plot• 選取作圖範圍• 選取作圖型式 -散佈圖

0 0.05 0.1 0.15 0.2 0.250

0.050.1

0.150.2

0.250.3

0.350.4

0.450.5

Set 1Set 2Average

[BSA], mg/ml

Abso

rptio

n, 5

95 n

m

Page 4: Standard curve

Step 3a: Find the slope• 點選” Average”符號,按滑鼠右鍵現出選單• 點選”加上趨勢線”

Page 5: Standard curve

• 趨勢線選項 :線性設定截距 =0圖表上顯示公式

Step 3b: Find the slope

0 0.05 0.1 0.15 0.2 0.250

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

f(x) = 2.16256369426752 x

OD595 Set 1OD595 Set 2OD595 AverageLinear (OD595 Average)

Page 6: Standard curve

Step 4: Label the axis• 在工具列點選”圖表工具” > 版面配置

點選座標軸標題

0 0.05 0.1 0.15 0.2 0.250

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

f(x) = 2.16256369426752 x

Set 1Set 2AverageLinear (Average)

[BSA], mg/ml

Abso

rptio

n, 5

95 n

m

Page 7: Standard curve

Step 5: Calculate sample conc.

• 輸入未知濃度樣品之吸光值及稀釋倍數。• 由標準曲線之公式求出樣品濃度,再乘以稀釋倍數,為原始樣品中蛋白質濃度。– 利用『公式』減少重覆的計算

Page 8: Standard curve

The End