This standard specifies the method for determining caprolactam by high performance liquid chromatography. This standard is applicable to the determination of caprolactam in nylon 6 resin and molded products polymerized with caprolactam as raw material. The detection limit of this method is 2ng, and the minimum detection concentration is 0.2mg/L based on 10μL injection. GB/T 5009.125-2003 Determination of caprolactam in nylon 6 resin and molded products GB/T5009.125-2003 Standard download decompression password: www.bzxz.net

1C867.040
National Standard of the People's Republic of China
GB/T 5009.125—2003
Replaces CB/ 14—19J4
Determinatlon of 6-caprolactam innylon 6resin and its molded products products
2003-08-11 promulgated
Ministry of Health of the People's Republic of China
National Chemical Engineering Administration
2004-01-01 implementation
GB/T5999.135-200
This standard replaces CE/T14956-1994 nylon 6 resin moldings - 4 analytical method for hydroxyethyl amine hygienic standard. Compared with GB/T14965-1994, the main changes of this standard are as follows: the Chinese name of the standard has been changed to "Determination of hydroxyethyl amine in nylon 6 resin and moldings according to GB/T20051.4-2001 "Rules for the preparation of standards - Part 4: Chemical analysis method"; the structure of the original standard has been modified
This standard is proposed and managed by the Ministry of Health of the People's Republic of China. The drafting units of this standard are: Daihan City Health and Prevention Station, Chaoyang Province Health and Epidemic Prevention Station, Hangzhou City Health Station. The main contributors of this standard are Mao Xiaoying, Guo Qiyong, Chen Ming and Chen Weijun. The standard was first issued in 1994, and this is the first revision. 122
GB/T5009.125—2003
Determination of Caprolactam in Nylon 6 Resin and Moldings This standard specifies the determination of caprolactam in nylon 6 resin and moldings by high performance liquid chromatography-mass spectrometry. This standard is applicable to the determination of caprolactam in nylon 6 moldings with caprolactam as raw material. The method is calculated as 2:0 for the sample, and the detection amount is 2/2. The moldings are subjected to boiling water bath treatment, and the sample is dissolved in the solution and directly measured by two phase separation to ensure the qualitative determination, or the peak value is determined. 3 Reagents
3.: Energy content of carbon spheres 1. When adding the base, be careful to avoid excessive water > internal pressure. Dissolve in water and release oxygen! 00L This environment contains 2.6g of internal age per liter. It can be stored in the refrigerator for 5 months, 3.27+ chromatographic pure,
4.1 High-efficiency filter chromatograph.
4.2 Chromatographic analysis,
a) Chromatographic rod, 4.mxlsnmmx10Ch reverse phase b
Analyzer length: 2mn
R micrometer: 0.5AUTSWww.bzxZ.net
) Fluidization: 11
e) Speed, I, ral/mia or 2. mL/Inia; Injection method: 0
5 Analysis step
5. Draw the energy curve of caprolactam, take 1.0 mL of caprolactam standard and dilute it with steam. D,5.J = 0,5.C, 00..200.0/ml.. Take 10t. of the colorimeter, take the injection number (ug) as the horizontal axis, and take the peak product or quotient as the coordinate to plot the curve.
5.2.1 Tree,
Currently called 5. Tree pattern, according to the band g 2ml of sample is filled with water, add 17ml of distilled water to the boiling water, and then put it into a 10ml volumetric flask to the scale. The bubble width is HA2.453. The film passes through the membrane and is separated according to the standard discharge color conditions. According to the peak height or the peak speed, the corresponding amount is found from the standard line. The standard and sample color are shown in Figure 1. 5.2.2 Molded products:
Some molded products are tested with the same resin. Other broken products are tested with the square thickness of 21. Please read the missing parts carefully. 123
GB/T 5009.125-.-2003
Hexadecene is removed
and the separation
hexadecene is removed
5. 3 Calculation of results
The sample is calculated according to formula (1):
In the middle,
surrounding 1 color into the light
Caprolactam (mg/L) =
A select the corresponding standard content. The unit is microgram (Ag): sample volume, the unit is liter (mL).
The fat is calculated according to formula (2):
Lactam (mg/kg) =
V×1 000
is sufficient to prove the grinding formula
where:
is the standard content of the sample, in micrograms (g);
is the resin content, in units of points ();
V, --- the volume of the sample, in units of liters (mF); F: the volume of the complete foaming volume, in milliliters (mL), 124
+x1000
. (2)
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