RoHS2.0 phthalate test solutions – L6000 liquid chromatograph RoHS tester

1.1 background

Phthalic acid ester, also called phthalate, abbreviation PAEs, formed phthalic acid esters. Mainly used as plasticizer, resin, rubber, etc can become even more soft, are often added in vinyl chloride these common material. Therefore, phthalic acid ester material widely exists in the toys, food packaging materials, medical patient and hose, lubricating oil, a products, electronic products such as hundreds of products. Because of phthalic acid esters material has stronger metastatic, from long-term exposure to plastic products, food packaging on food or unload into the skin, to enter the body. This kind of material in the human body plays a role similar to estrogen, may interfere with the endocrine, endanger human body health. Various countries have issued standards of phthalic acid esters substances in food contact materials, children’s toys, cosmetics, etc. The usage of articles for daily use is limited.

In recent years, the eu has been closely watched compulsory standards – “about limit use of certain harmful components in electrical and electronic equipment directive (RoHS directive, relative to the old version, how will the new European RoHS directive called RoHS2.0) In the promulgation of the latest version will also be phthalate (2 – ethyl) ester (DEHP), butyl phthalate (DBP), phthalic acid butyl benzyl ester and phthalate (BBP) butyl ester (DIBP) substance added to limit the use of these four components. These substances in the homogeneous material 0.1% respectively for the maximum allowable concentration, on July 22, 2019. Since the implementation of the directive in EU listed all of the electrical and electronic equipment (except for medical devices and monitoring control) and its downstream suppliers such as production of spare parts, raw materials and packaging are all involve the DEHP, DBP and BBP, DIBP content detection.ESI

RoHS2.0 phthalate test solutions – L6000 liquid chromatograph RoHS tester

1.2 L – 6000 type high performance liquid chromatography (HPLC) system configuration list

[1.3 List of main chemical reagents and standard

Main sample pretreatment equipment

1.4 prior to processing

1.4.1 standard solution preparation

Four kinds of phthalic acid ester standard stock solution (1000 ug/mL) : accurately said BBP, DIBP, DBP and DEHP each 25 mg, dissolved in methanol/acetonitrile (50/50) and constant volume to 25 mL. Four kinds of phthalic acid ester standard working liquid: prepared with methanol/acetonitrile 1 (50/50) concentrations were 1.0 mu g/mL, 5.0 mu g/mL, 10 mu g/mL, 20 mu g/mL, 50 ug/mL, 100 mu g/mL of standard working fluid.

RoHS2.0 phthalate test solutions – L6000 liquid chromatograph RoHS tester

1.4.2 sample pretreatment

According to samples from 0.5 + / – 0.01 g shredded, accurate to 0.0001 g, in cellulose extracted soxhlet extractor tube sets, with glass cotton floating cover casing to prevent sample. Accurate add in 120 ml of n-hexane reflux extraction, 6 ~ 8 cycles per hour. Reflux after 6 h, spin steaming in the vacuum concentration to 10 ml, constant volume to 50 ml.

Dilution: 1.0 mL in 10 mL volumetric flask to add methanol/acetonitrile (V/V = 50/50) diluted to scale, shake well, it take 5.0 mL in the other – 10 mL volumetric flask and add methanol/acetonitrile (V/V = 50/50) diluted to scale, the solution for the 20 times diluted solution, the diluent analysis together with the original solution.

“1.5 Chromatographic conditions

Chromatographic column: Supersil ODS2 5 microns 4.6 x 250 mm

Mobile phase: A: methanol/acetonitrile (50/50), B: water

Flow rate: 1.0 mL/min: detection wavelength 240 nm

Sample size: 20 mu L

Column temperature: 30 ° ℃

RoHS2.0 phthalate test solutions – L6000 liquid chromatograph RoHS tester

Is connected to the Internet to identify and translation…Samples from a certain brand of electronic products, according to the method described herein before treatment and analysis of the spectra obtained are as follows

conclusion

Use the liquid chromatograph L6000RoHS tester solution can satisfy RoHS2.0 instructions of DEHP, DBP and BBP, DIBP, polybrominated biphenyls (PCBS) and polybrominated diphenyl ether test requirements, low equipment cost, simple operation, fast analysis speed, etc.