GB
2010-03-26 2010-06-01
National food safety standard
Determination of nitrite and nitrate in foods
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GB/T 5009.33-2008
GB/T 5009.33-2008
——
——
——GB 5009.33-1985 GB/T 5009.33-1996 GB/T 5009.33-2003 GB/T 5009.33-2008
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1
18.2 M •cm
CH3COOH
KOH
3 % 3.2 3 mL 100 mL
NO2
- 100 mg/L
NO3
- 1000 mg/L
NO2
- NO3
-
NO2
- NO3
- 1.0 mL 100 mL
1 L 1.0 mg 10.0 mg
50 L
0.1 mg 1 mg
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2
10000 / 5 mL 10 mL
0.22 m
C18 Ag Na
1.0 mL 2.5 mL
2 mol/L 4 h 3 5
( ) 2
5 g 0.01 g
80 mL 100 mL 30 min 5 min
75 5 min
10 000 / 15 min
2 g 0.01 g 80 mL 100 mL
30 min 5 min 75 5 min
10 000 / 15 min
10 g 0.01 g 100 mL 80 mL 30 min
3 % 2 mL 4 20 min
2.5 g 0.01 g 100 mL 80 mL 30 min
3 % 2 mL 4 20 min
15 mL 0.22 m C18 3 mL
100 mg/L C18 Ag Na 7 mL
OnGuard II RP 1.0 mL OnGuard II Ag 1.0 mL
OnGuard II Na 1.0 mL 1 OnGuard II RP 1.0 mL 10 mL
15 mL 30 min OnGuard II Ag 1.0 mL OnGuard II Na 1.0 mL 10
1
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3
mL 30 min
Dionex IonPac AS11-HC
4 mm×250 mm IonPac AG11-HC 4 mm×50 mm 1
6 mmol/L 70 mmol/L 6 mmol/L 30 min 70
mmol/L 5 min 6 mmol/L 5 min 1.0 mL/min
5 mmol/L 50 mmol/L 5 mmol/L 33
min 50 mmol/L 5min 5 mmol/L 5 min 1.3 mL/min
35
50 L
0.00 mg/L 0.02 mg/L 0.04 mg/L 0.06 mg/L 0.08 mg/L 0.10 mg/L 0.15 mg/L 0.20 mg/L
0.0 mg/L 0.2 mg/L 0.4 mg/L 0.6 mg/L 0.8 mg/L 1.0 mg/L 1.5 mg/L 2.0 mg/L
1
mg/L S
50 L
S
NO2
- NO3
- 1
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4
1000
1000)( 0
m
fVcc
X 1
X —— mg/kg
c—— mg/L
c0—— mg/L
V—— mL
f——
m—— g
1.5
1.37
10 %
GB/T 6682
K4Fe CN 6·3H2O
Zn CH3COO 2·2H2O
CH3COOH
Na2B4O7·10H2O
1.19 g/mL
25 %
C6H7NO3S
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5
C12H14N2·2HCl
NaNO2
NaNO3
106 g/L 106.0 g 9.1 1000 mL
220 g/L 220.0 g 9.2 30 mL 9.3
1000 mL
50 g/L 5.0 g 9.4 100 mL
pH 9.6 9.7 30 mL 9.5 100 mL 65 mL 9.6
1000 mL pH 9.6 9.7
50 mL 9.16 500 mL
(0.1 mol/L) 5 mL 600 mL
4 g/L 0.4 9.7 100 mL 20 % V/V
2 g/L 0.2 g 9.8 100 mL ,
200 g /mL 0.1000 110 120
500 mL
5.0 g/mL 5.00 mL 200 mL
200 g/mL 0.1232 g 110 120
500 mL
5 g/mL 2.50 mL 100 mL
0.1 mg 1 mg
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6
500 mL (200 g/L) 3 h 4 h
500 mL 2 s
20 40
2 2 cm
8 cm 10 cm 1 cm
25 mL
25 mL (0.1 mol/L) 25 mL
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7
25 mL 0.1 mol/L 25 mL
20 mL 5 mL
5 mL
10.0 mL 10 g 50 mL 11.4
0.00 mL 0.20 mL 0.40 mL 0.60 mL 0.80mL 1.00mL
98%
2
100
10
A
X % 2
X—— %
A—— g
10—— g
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5.1
5 0.01 g 50 mL
12.5 mL 9.15 70 300 mL 500 mL
15 min
5 mL 9.13 , , 5 mL 9.14 ,
, , 30 min, , , 30 mL,
40.0 mL 50 mL 0.00 mL 0.20 mL 0.40 mL 0.60 mL 0.80
mL 1.00 mL 1.50 mL 2.00 mL 2.50 mL 0.0 1.0 2.0
3.0 4.0 5.0 7.5 10.0 12.5 50 mL
2 mL 9.19 3 min 5 min 1 mL
(9.20) 15 min 2 cm
538 nm
25 mL 9.17 3 mL/min 5 mL/min
2 mL/min 3 mL/min
20 mL 50 mL 5 mL 9.16
5 mL
100 mL
20 mL
10 mL 20 mL 50 mL 11.4 “ 0.00 mL 0.20 mL 0.40
mL 0.60 mL 0.80 mL 1.00 mL……”
3
1
1
1
0
1000
1000
A
X
V
m
V
3
X1—— mg/kg
A1—— g
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9
m——
V1—— mL
V0 —— mL
4
2
2 1
2 4
0 3
1000
1.232
1000
A
X X
V V
m
V V
4
X2—— mg/kg
A2—— g
m—— g
1.232——
V2—— mL
V0—— mL
V3—— mL
V4—— mL
X1—— 3 mg/kg
10 %
N-1- - 538 nm
16.10 17.1 17.2 17.3
NaNO2
KNO3
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10
0.3 mm 0.8 mm
40g/L CdSO4·8H2O 24 h
2 3 400 mL 0.1 mol/L
17.1.1 17.1.8
20 g CuSO4·5H2O 1000 mL
- pH 9.60 9.70 600 mL 75 mL 36 % 38 %
135 mL 25 % 1000 mL
pH pH 9.60 9.70
(2 mol/L) 160 mL 36 % 38 % 1000 mL
0.1 mol/L 50 mL 2 mol/L 1000 mL
53.5 g ZnSO4·7H2O 100 mL
17.2 g [K4Fe(CN)6·3H2O] 100 mL
EDTA 33.5 g Na2C10H14N2O3·2H2O 1000 mL
1 450: 550 450 mL 36 % 38 % 550
mL
2 5 g/L 75 mL 5 mL 36 % 38 %
0.5 g NH2C6H4SO2NH2 100 mL
3 1 g/L 0.1 g N-1- -
C10H7NHCH2CH2NH2·2HCl 100 mL
2 5
0.001 g/L
110 120 0.150 g 1000 mL
10 mL 20 mL 15.5 1000 mL
1 mL 1.00 g NO2
0.0045 g/L
110 120 1.4580 g 1000 mL
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11
1000 mL 5 mL 20 mL 15.5
1 mL 4.50 g NO3
0.1 mg 1 mg
100 mL
250 mL 500 mL
100 mL 500 mL 1000 mL
2 mL 5 mL 10 mL 20 mL
2 mL 5 mL 10 mL 25 mL
9 cm
18 cm
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12
3
538 nm 1 cm 2 cm
pH ± 0.01 pH 7 pH 9
15.3 16.3
15.6
15.4 2.5 mL 1 min
3
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13
15 cm
20 cm
750 mL 225 mL 15.14 20 mL 15.5
20 mLEDTA 15.9 6 mL/min
50 mL
20 mL 15.14
5 mL 15.5 100 mL 6 mL/min
15 mL 15 mL
100 mL
10 mL 100 mL 60 mL 17.8.2 17.8.4
17.8.5 17.2.4
g/mL NO- 0.067 g/mL 100 %
95 %
95%
100 mL 5 mLEDTA 15.9 2 mL 15.7 10 mL/min
25 mL 25 mL 15.7 25 mL
95%
90 mL 500 mL 22 mL 50 55
100 mL 10 g 0.001 g 112 mL 50 55
500 mL
100 mL 10 g
0.001 g 112 mL 50 55 500 mL
15 min 50
24 mL 15.8.1 24 mL 15.8.2 40 mL
15.5
15 min 1 h 16.9 250 mL
20 mL 100 mL 5 mL 15.5
6 mL/min 100 mL
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15 mL 15 mL
100 mL
20 mL 17.6.3 20 mL 17.5.2 100 mL 60 mL
6 mL 1 15.10 5 mL 2 15.11
5 min
2 mL 3 15.12 5 min
15 min 538 nm
0 mL 2 mL 4 mL 6 mL 8 mL 10 mL 12 mL 16 mL
20 mL 15.13 9 100 mL 60 mL
6 mL 1 15.10 5 mL 2 15.11
5 min
2 mL 3 15.12 5 min
15 min 538 nm
g/100 mL
5
1
120000
Vm
c
X 5
X—— (mg/kg)
c1—— 17.5.2 17.7.4 NO2
g/100mL
m—— 90×1.030g g
V1—— 17.5.2 17.7.1 mL
6
W NaNO2 1.5×W NO2
- 6
W NO2 —— mg/kg
W NaNO2 —— mg/kg
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15
7
2
2
210000035.1 NOW
Vm
c
X 7
X—— mg/kg
c2—— 17.6.3 17.7.4
g/100mL
m—— g
V2—— 17.6.3 17.7.1 mL
W NO2- —— 5
8
mg/kg =
r
NOW
Vm
c 100100000
35.1
2
2
2 8
r——
9
W NaNO3 =1.371×W(NO3
-) 9
W NO3 —— mg/kg
W NaNO3 —— mg/kg
1 mg/kg
30 mg/kg
3 mg/kg 30 mg/kg 10%
30 mg/kg
8 mg/kg 30 mg/kg 25 %
0.2 mg/kg 0.4 mg/kg
1 mg/kg 1.4 mg/kg 0.2 mg/kg 1.5 mg/kg
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