Quality control methods for

Silver nitrate (40 g/l) TS. A solution of silver nitrate R containing about 42.5g of 
AgNO
3
per litre (approximately 0.25 mol/l). 
 
Simazine R. C
7
H
12
CIN
5
. 
A commercially available reagent suitable for use as a reference material. 
 

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Quality control methods for medicinal plant materials 
Soda lime R. 
A suitable commercially available reagent. 
 
Sodium acetate R. C
2
H
3
NaO
2
,3H
2
O. 
A suitable commercially available reagent. 
 
Sodium acetate (1.6 g/l) TS. A solution of sodium acetate R containing about 
1.64 g of C
2
H
3
NaO
2 
per litre (0.02mol/l). 
 
Sodium carbonate R. Na
2
CO
3
,10H
2
O. 
A suitable commercially available reagent. 
 
Sodium carbonate, anhydrous, R. Na
2
CO
3
.
A suitable commercially available reagent. 
 
Sodium carbonate (50 g/l) TS. A solution of sodium carbonate R containing 
about 50g of Na
2
CO
3
per litre (approximately 0.5 mol/l). 
Sodium carboxymethylcellulose R. 
A suitable commercially available material for chromatography. 
 
Sodium chloride R. NaCl. 
A suitable commercially available reagent. 
 
Sodium chloride (400 g/l) TS. A solution of sodium chloride R containing about 
400g of NaCl per litre. 
Sodium chloride (100 g/l) TS. A solution of sodium chloride R containing about 
100g of NaCl per litre. 
Sodium citrate R. C
6
H
5
Na
3
O
7
,2H
2
O. Quality of substance conforms to the mono-
graph in The international pharmacopoeia, vol. 3, p. 192.