*Microwave-Assisted Extraction of Bioactive Compounds (Review) DOI: http://dx.doi.org/10.5772/intechopen.96092*

**Number**

**22**

41.

*Radix astragali*

 **Plant sample**

**Results obtained** ethanol (80%), Extraction time = 6 min with

15 s power-on and 30s power-off

MAE:

Flavonoids

The yield of flavonoids was closer to that of

[32]

SOX with methanol and higher than that of

UAE with methanol.

Microwave

 power = 1,000 W,

Temperature

(90%), time = 25 min

DMAE:

Flavonoids (1.72%)

Very short time and little solvent quantity

[75]

required.

Microwave

methanol (80%), Extraction time = 5 min

 DMAE: Microwave

ethanol (80%), Extraction time = 60 min

MAE:

Total phenolic content

Very short time and little solvent quantity

[76]

required.

(TPC = 96.78 mg/g), excellent

scavenging

to synthetic antioxidant

Total phenolic

Higher yield in little time of extraction.

 [16]

> content (TPC = 23.8 mg GAE/

g) in

Salidroside

123%)

 and tyrosol (94.4–

Good recoveries.

[77]

*Rosmarinus*

 *officinalis*

 BHT

 ability comparing

Microwave

 power = 500 W,

Temperature

ethanol (95%), Extraction time = 30 min

MAE:

Microwave

acetone (60%), Extraction time = 4 min

 MAE: Microwave

methanol (50%), Extraction time = 5 min

Solvent/feed

 ratio = 5,

 power = 400 W, Solvent = 5 mLof

Solvent/feed

 ratio = 20:1,

 power = 750 W, Solvent = 20 ml of

45.

 Plants of Labiatae,

Verbenaceae,

Styracaceae

46.

 Dried roots of *Rhodiola* L.

 and

Solvent/feed

 ratio = 10,

 = 80 °C, Solvent = 50 mL of

Solvent/feed

 ratio = 50,

 power = 1200 W, Solvent = 2 L of

Solvent/feed

 ratio = 500:1, Flavonoids (4.97%)

In comparison without a microwave,

improvement.

 with the same dynamic system

[40]

*Microwave Heating - Electromagnetic Fields Causing Thermal and Non-Thermal Effects*

 it showed significant

 power = 80 W, Solvent = 5 mL

42.

*Platycladus*

(book-leaf pine)

> 43.

44.

 Longan peel

*Saussurea medusa* Maxim

 *orientalis*

 = 110 °C, Solvent = Ethanol

Solvent/feed

 ratio = 25, Extraction

**Bioactive compounds**

 **Remarks**


**Number**

**25**

61.

62. 63. *HRE: Heat reflux extraction, MHG: Microwave* 

*Microwave dry-diffusion* *VMHG: Vacuum microwave* 

**Table 2.** *Bioactive compounds*

 *extracted through MAE from different plant samples.*

 *and gravity, MWHD:* 

*hydro-diffusion*

 *and gravity, CSE:* 

*Chromolaena*

 *odorata* leaves

 MAE: Microwave

water (51/49%, v/v), Extraction time = 3 min

*hydro-diffusion*

*Microwave-assisted*

*Conventional*

 *solvent extraction.*

*hydrodistillation;*

 *HD:* 

*Hydrodistillation,*

 *USAE: Soxhlet extraction,* 

 *and gravity, MASD:* 

 power = 493 W, Solvent = ethanol/

*Hibiscus sabdariffa*

MAE:

Microwave

water (52/48%, v/v), Extraction time = 4 min

Solvent/feed

 ratio = 15,

 power = 450 W, Solvent = ethanol/

 Scent leaves

MAE:

Microwave

Solvent/feed

time = 3 min

 ratio = 10, Extraction

 power = 553 W, Solvent = water,

 **Plant sample**

**Results obtained**

**Bioactive compounds**

content = 52.72

g d.w.

Total phenolic

content = 184.99

GAE/g extract

Total flavonoid

content = 68.78

QE/g extract

Total flavonoid

Recovery of higher yield in a shorter time.

 [6]

*Microwave-Assisted Extraction of Bioactive Compounds (Review)*

*DOI: http://dx.doi.org/10.5772/intechopen.96092*

content = 94.32 mg QE/g

extract

Total phenolic content = 88.52

Recovery of higher yield in a shorter time.

 [9]

mgGAEgDW1

Total flavonoid

content = 68.84 mgQEgDW1

*Microwave-accelerated*

 *steam distillation,*

 *SD steam distillation,*

 *SFME: Solvent-free*

*ultrasound-assisted*

 *extraction, MSD: Microwave steam distillation,*

 *microwave extraction, MDG:*

 2.07 mg

 3.05 mg

Recovery of higher yield in a shorter time.

 [22]

 0.93 mg QE/

 **Remarks**


*VMHG: Vacuum microwave hydro-diffusion and gravity, CSE: Conventional solvent extraction.*

#### **Table 2.**

*Bioactive compounds extracted through MAE from different plant samples.*
