-
修订号
Rev.
:
8
1
目的与范围
Scope and Purpose
用
HPLC
测定大宝化妆品中尼泊金甲酯、丙酯
,苯氧乙醇的含量
.
This method is
applicable to the determination of Phenoxyethanol,
Methyl Paraben and Propyl
Paraben by
HPLC in Dabao products.
2
特殊安全防范措施
Unusual Safety
Precautions
根据化学试剂的材料安全数据表来进行相应的安全操作与防护。
Use Material Safety Data Sheets (MSDS)
regarding the safe handling of chemicals
specified.
3
方法原理
Principle of method
通过采用梯度洗提,用
HPLC
和
C-18
反相色谱柱将尼泊金酯和苯氧乙醇从样品中和其它组份相互分离开
。
用外标法进行定量。
Phenoxyethanol and Parabens are
separated from each other as well as from other
components
in the sample by gradient
elution HPLC using a C-18 reverse phase column.
The components are
detected using an UV
detector 254 nm and quantitated by a method of
external standardization.
4
基本方程式
Fundamental Equations
无
None
5
干扰因素
Interferences
任何和尼泊金甲酯、丙酯,苯氧乙醇具有相同保留时间的化合物都可能产生干扰。
Under the conditions prescribed, the
method is selective/specific and no interferences
are
evident
6
精确度与准确度
Precision
无
None
7
仪器
Equipment
7.1
7.2
装备紫外检测器的液相色谱
HPLC with UV
Detector
色谱柱
Columns
:
Hypersil ODS 250*4.6mm 5
μ
m
30105-254630
(
other
products
)
Prodigy 5
μ
m ODS3 100A (250
X 4.6 mm)
Cat
no
:
OOG-4097-E0
(大宝眼袋霜
Dabao
Eye Bag Cream (F#
WJ238-40394)
)
7.3
7.4
7.5
7.6
8
0.45?m
PVDF
或者类似型号针头式过滤器
Filters,
0.45
μ
m PTFE filters or
equivalent
HPLC
进样瓶
Auto sampler vials
50
毫升,
100
< br>毫升容量瓶
50ml
,
100ml volumetric flask
2
毫升,
5
毫升移液管
2ml
,
5ml pipet
试剂
Reagents
8.1
8.2
8.3
8.4
8.5
8.6
去离子水
Purified water (Milli Q)
or equivalent
乙腈(
HPLC
级)
HPLC Grade
Acetonitrile or equivalent
甲醇(
HPLC
级)
Methanol
HPLC Grade or equivalent
冰醋
酸(
AR
)
Acetic acid
AR Grade or equivalent
尼泊金甲酯
标准物质,有已知含量和失效期
Methyl
paraben, Reference standard with
known
purity.
尼泊金丙酯
标准物质,有已知含量和失效期
Propyl
paraben, Reference standard with
修订号
Rev.
:
8
known purity.
8.7
苯氧乙醇
标准物质,有已知含量和失
效期
2-phenoxyethanol, Reference standard
with
known purity.
9
标准溶液配制
Standard Preparation
9.1
准确称取如下标准物质至
p>
100ml
的容量瓶中,准确至
0.1
p>
毫克。
Into a single
100 ml volumetric flask, weigh each of the
following
尼泊金甲酯
Methyl
Paraben 0.05g
尼泊金丙酯
Propyl Paraben
0.03g
苯氧乙醇
Phenoxyethanol
0.13g
9.2
9.3
用甲醇溶解并稀释至刻度并混
合均匀。
(
储备液
)
Dilute to volume with Methanol (8.3)
and mix thoroughly (Stock standard)
移取<
/p>
5.0ml
储备液于
50
毫升容量瓶中,用甲醇稀释至刻度并混合均匀(工作标液)。
Pipet
5.0
ml
of
the
diluted
standard
in
to
a
50
ml
volumetric
flask,
dilute
to
volume
with Methanol and mix thoroughly (Working
standard)
9.4
通过<
/p>
0.45
μ
m
针
头式过滤器过滤工作标准样品于
HPLC
样品瓶中,弃去前
p>
1-2ml
滤液。
Filter
approximately
2-3
ml
through
a
0.45
μ
m
PVDF
filter
(7.3)
in
to
an
autosampler vial. Discard the first 1-2
ml through the filter .Finally collect the
filtrate in autosampler vial for
analysis.
9.5
重复<
/p>
10.1-10.3
配制另一个标准样品
-
核实标准样品。
Prepare
a check standard by repeating steps 9.1 through
9.4
10
样品配制
Sample Preparation
注
Note:
?
含有单一组成的产品,使样品的浓度与标准溶液的浓度匹配。
For
the
products
containing
single
component
match
the
concentration
of
sample with standard.
?
含有苯氧乙醇、尼泊金甲酯和尼泊
金丙酯或者苯氧乙醇和尼泊金甲酯或者尼泊金甲酯和
丙酯的组合的产品,使样品中尼泊金
甲酯的的浓度与标准溶液的浓度匹配。
For the
products containing combinations of
Phenoxyethanol, Methyl Paraben,
Propyl
Paraben
or
Phenoxyethanol
and
Methyl
Paraben
or
Methyl
Paraben
and
Propyl
Paraben
match
the
concentration
of
sample
with
Methyl
Paraben
standard.
?
含有苯氧乙醇和尼泊金丙酯的组合的产品使样品中苯氧乙醇的的浓度与标准溶液中的浓
度匹配。
For the products
containing combination of Phenoxyethanol and
Propyl Paraben
match the concentration
of sample with Phenoxyethanol standard.
?
大宝清爽保湿防晒露
F# LY243-41232,
称取
0.9g
样品至
50ml
容量瓶。
For
Dabao
UV
Lotion,
F#
LY243-41232
weigh
0.9
g
of
sample
in
to
a
50
ml
volumetric flask.
10.1
10.2
准确称取
< br>0.8g
样品于
50ml
容量瓶
中。
Weigh, 0.8 g of sample in
to a 50 ml volumetric flask.
加入约
10ml
甲醇,超声波振荡至样品完全分散,用甲醇稀释至刻度。
Add
approximately
10
ml
of
Methanol
to
the
flask
and
stopper.
Sonicate
and
shake
vigorously
until
the
sample
is
completely
dispersed
and
no
globules
of
product
修订号
Rev.
:
8
remain. Dilute
to volume with Methanol and mix thoroughly.
10.3
通过
0.45um
过滤膜过滤工作标准样品于
HPLC
样品瓶中,弃去前
1-2ml
滤液。
Filter approximately 2-3 ml
through a 0.45
μ
m PTFE
filter in collect the filtrate
in auto
sampler vial for analysis. Discard the first 1-2ml
filtrate.
10.4
重
复
11.1-11.3
配制一个平行测试样品。
Repeat 11.1-11.3 to prepare a
parallel sample.
11
运行参数
Operating Conditions
11.1
大宝
SOD
蜜(
F#WJ238-40365
)和大宝眼袋霜
(F# WJ238-40394,F#
WJ238-40366)
Operating conditions for
Dabao SOD Milk (F# WJ238-40365) Dabao Eye Bag
Cream (F#
WJ238-40394) and Dabao Eye
Bag Cream (F# WJ238-40366)
检测波长
Wave
length
:
254nm
柱温
Oven
temperature
:
25
℃
进样量
Injection
volume
:
20
μ
l
流动相组成
Mobile phase gradient:
A=
去离子水
750ml+250ml
乙腈
+2ml
冰醋酸
B=100%
乙腈
A =
Purified water 750 ml + 250 ml Acetonitrile + 2 ml
Acetic acid Degas
B = 100% Acetonitrile
流速
Flow rate:
1.0ml/min
运行时间
Run
time
:
25 min
时间程序
Gradient table:
步骤
Step
1
2
3
4
5
6
时间(分钟)
time (min)
0.0
15.0
18.0
20.0
22.0
25.0
流速
(ml/min)
Flow
rate(ml/min)
1.0
1.0
1.0
1.0
1.0
1.0
A
(
%
)
90
90
10
10
90
90
B
(
%
)
10
10
90
90
10
10
11.2
其他产品
For Other finished
products
Typical Instrument settings:
检测波长
Wave
length
:
254nm
柱温
Oven
temperature
:
40
℃
进样量
Injection
volume
:
20
μ
l
流动相组成
Mobile phase
gradient
:
A=
去离子水
750ml+250ml
乙腈
+2ml
冰醋酸
B=100%
乙腈
A = Purified
water 750 ml + 250 ml Acetonitrile + 2 ml Acetic
acid
B = 100%
Acetonitrile
流速
Flow rate:
1.0ml/min
运行时间
Run
time
:
25min
时间程序
Gradient
table
:
步骤
时间(分钟)
流速
(ml/min)
step
time/min
flow rate(ml/min)
1
0.0
1.0
2
6.0
1.0
3
8.0
1.0
4
15.0
1.0
A
(
%
)
100
100
55
15
B
(
%
)
0
0
45
85
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