GB 1886.230-2016 English PDF (GB1886.230-2016)

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GB 1886.230-2016: Food additive -- L-ascorbyl palmitate
GB 1886.230-2016
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National Food Safety Standard -
Food Additives - Ascorbyl Palmitate
食品添加剂 抗坏血酸棕榈酸酯
ISSUED ON: AUGUST 31, 2016
IMPLEMENTED ON: JANUARY 01, 2017
Issued by: National Health and Family Planning Commission of the PRC
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Chemical name, molecular formula, structural formula, and relative molecular
mass ... 4 
3 Technical requirements ... 4 
Appendix A Inspection methods ... 6 
National Food Safety Standard -
Food Additives - Ascorbyl Palmitate
1 Scope
This Standard applies to the ascorbyl palmitate, a food additive prepared by
reacting palmitic acid with thionyl chloride to obtain palmitoyl chloride and
reacting with ascorbic acid.
2 Chemical name, molecular formula, structural
formula, and relative molecular mass
2.1 Chemical name
Ascorbic acid hexadecanoate
2.2 Molecular formula
C22H38O7
2.3 Structural formula
2.4 Relative molecular mass
414.56 (according to 2013 international relative atomic mass)
3 Technical requirements
3.1 Sensory requirements
Sensory requirements shall be in accordance with Table 1.
USE iodometry. This product contains an enediol structure in its
structure, has strong reducibility, is easily oxidized by iodine solution to a
diketone structure , and simultaneously reduces iodine to form hydrogen
iodide (HI).
A.3.2 Reagents and materials
A.3.2.1 Iodine standard titration solution: c(12I2)=0.1 mol/L.
A.3.2.2 Absolute ethanol.
A.3.3 Analytical procedures
WEIGH about 0.3 g (accurate to 0.0002 g) of sample; PLACE it into a 250 mL
conical flask; ADD 50 mL of absolute ethanol to dissolve it; ADD 30 mL of water
and shake well. Immediately USE the iodine standard titration solution to titrate,
until yellow appears and remains 30 s without fading as the end point. RECORD
the volume (mL) of the iodine standard titration solution consumed.
A.3.4 Result calculation
Ascorbyl palmitate content (C22H38O7) w1 is calculated according to formula
(A.1):
Where:
V - The volume of the iodine standard titration solution consumed by titrating
the sample, in milliliters (mL);
c1 - The concentration of the iodine standard titration solution, in moles per liter
(mol/L);
0.2073 - The mass of ascorbyl palmitate expressed in grams equivalent to 1.00
mL of iodine standard titration solution [c(12I2)=1.000 mol/L];
m1 - The mass of sample weighed, in grams (g).
The test result is based on the arithmetic mean of parallel determination results.
A.5.1.3 Balance: The sensitivity is 0.0001 g.
A.5.1.4 Flat weighing bottle.
A.5.2 Analytical procedures
WEIGH about 1 g (accurate to 0.0001 g) of sample; PLACE it into a constant-
weight weighing bottle. Then, PLACE the weighing bottle in a vacuum drying
oven; at 56 °C~60 °C, about 2.67 kPa (20 mmHg), DRY for 1 h. After the
pressure in the vacuum drying oven returns to normal, TAKE the weighing bottle
out. PLACE the weighing bottle into a dryer; COOL to room temperature and
weigh.
A.5.3 Result calculation
The mass fraction w2 of loss on drying is calculated according to the formula
(A.3):
Where:
m2 - The sample mass before drying, in grams (g);
m3 - The sample mass after drying, in grams (g).
A.6 Determination of residue on ignition
A.6.1 Reagents and materials
Sulfuric acid.
A.6.2 Analytical procedures
WEIGH 1 g of sample (accurate to 0.01 g); PLACE it into a porcelain crucible
which has been burned at 700 °C~800 °C to a constant weight. First, USE a
small fire to slowly heat until completely carbonized. After cooling, ADD 0.5
mL~1.0 mL of sulfuric acid to make it moist. After heating at low temperature
until the sulfuric acid vapor is removed, MOVE it into a high temperature furnace
and burn it at 700 °C~800 °C to a constant weight.
A.6.3 Result calculation
Residue on ignition w3 is calculated according to formula (A.4):