求翻译：准确吸取上述标准葡萄糖溶液 1mL，加入 20mL 比色 管中，加入 5%苯酚溶液 1mL 充分混合，加入浓硫酸 5mL 并立即摇匀。室温下放置 20min ， 在 490nm 波长，测定吸光度值。以吸光度值为纵坐标，以葡萄糖含量为横坐标，绘制标 准曲线。是什么意思？

Accurately learn the standard glucose solution 1mL, add 20mL colorimetric tube, add 1mL of 5% phenol solution well mixed, add 5mL of concentrated sulfuric acid and immediately shake. Room temperature for 20min, at 490nm wavelength, absorbance values. The absorbance value of the vertical axis, glucos

The above-mentioned criteria accurately draw 1 glucose solution by adding 20 mL mL than color tubes, by adding 5% phenol solution 1 mL fully mixed, add concentrated sulfuric acid 5mL and shake up immediately. room temperature at 20 min, 490 nm wavelength, measuring absorbency value. The Absorbency v

Accurate absorption above standard glucose solution 1mL, joins in the 20mL color comparison, joins 5% phenol solution 1mL intensive mixing, joins strong sulfuric acid 5mL and swings immediately uniform.Under the room temperature lays aside 20min, in 490nm wave length, determination extinction value.

Accurate drawing above standard glucose solution 1mL, add 20mL in colorimetric tubes, joined 5% phenol 1mL mix by adding concentrated sulfuric acid 5mL and immediately shake. Place 20min at room temperature, at 490nm wavelength, absorption photometric values. Absorbance values to ordinate, with gluc

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