Quality control methods for

Starch R. 
A suitable commercially available reagent. 
Starch, soluble, R. 
A suitable commercially available reagent. 

---

Quality control methods for medicinal plant materials 
Starch TS. 
Procedure. Mix 0.5 g of starch R or of soluble starch R with 5 ml of water, and add 
this solution, with constant stirring, to sufficient water to produce about 100ml; 
boil for a few minutes, cool, and filter. 
Note. Starch TS should be freshly prepared. 
Sucrose R. C
12
H
22
O
11
. 
A suitable commercially available reagent. 
Sudan red G R. 1-(4-Phenylazophenylazo)-2-naphthol; sudan III; solvent red 23; 
C.I. 26100; C
22
H
16
N
4
O. 
Description. A reddish brown powder. 
Solubility. Practically insoluble in water; soluble in chloroform R.
A suitable commercially available reagent. 
Sudan red TS. 
Procedure. Dissolve 0.5g of sudan red G R in 100 ml of glacial acetic acid R. 
Sulfuric acid (∼1760 g/l) TS. d ∼ 1.84.
A suitable commercially available reagent. 
Sulfuric acid (∼1160 g/l) TS. 
Procedure. Add 660ml of sulfuric acid (∼1760g/l) TS to sufficient water to 
produce 1000 ml. 
 
Sulfuric acid (∼350 g/l) TS. 
Procedure. Add 200ml of sulfuric acid (∼1760g/l) TS to sufficient water to 
produce 1000 ml. 
Sulfuric acid (∼300 g/l) TS. 
Procedure. Add 171 ml of sulfuric acid (∼1760g/l) TS to sufficient water to 
produce 1000 ml (approximately 3mol/l). 
Sulfuric acid (∼37g/l) TS. 
Procedure. Add 21.5 ml of sulfuric acid (∼1760g/l) TS to sufficient water to 
produce 1000ml (approximately 0.375mol/l). 
Tetracycline R. C
22
H
24
N
2
O
8
. 
A suitable commercially available reagent.