-
E-mail
exinfeng01@163.com
-
Phone
13926596645
-
Address
Jinhai Building, No. 109, Songgang Section, Guangshen Road, Songgang Street, Bao'an District, Shenzhen
Shenzhen Yixinfeng Technology Co., Ltd
Common errors and correction methods in the operation of ROHS2.0 ortho benzene tester
Date: 2025-12-19Read: 0
With the inclusion of four types of phthalates (DEHP, BBP, DBP, DIBP) in the control scope of the EU ROHS 2.0 directive, benzene testing has become a key link in the compliance of electronic and electrical product exports. Many companies have already equipped themselves withROHS2.0 ortho benzene tester(usually GC-MS or rapid screening equipment), but there are still many misunderstandings in practical operation, which affect the accuracy and reliability of the detection results. Here are several typical errors and corresponding correction suggestions.
Error 1: Improper sample preparation
Some operators directly put the entire piece of plastic or cable into the extraction solvent without crushing, weighing, and homogenizing according to standards, resulting in low extraction efficiency and low results.
Correction method: Strictly follow the standard procedures such as IEC 62321, grind the sample to a particle size of ≤ 1 mm, accurately weigh it, and use a suitable solvent (such as n-hexane/toluene) to complete ultrasonic or Soxhlet extraction at the specified temperature and time.
Error 2: Ignoring instrument calibration and calibration
Long term failure to calibrate the testing instrument or use expired/inaccurate concentration standards to draw calibration curves can result in quantitative deviation or even misjudgment.
Correction method: Perform system suitability testing after each startup and regularly calibrate with certified reference materials (CRM); The calibration curve should contain at least 5 concentration points, and the correlation coefficient R ² should be ≥ 0.995.
Error 3: Confusing "screening" and "confirmation" results
Some companies rely on infrared or XRF rapid screening equipment to determine the content of adjacent benzene, but these methods cannot accurately identify the specific type and concentration of adjacent benzene, which can easily result in false negatives or false positives.
Correction method: Quick screening is only used for initial screening. For samples approaching the limit value (1000 ppm) or used for export customs declaration, a formal report must be issued through confirmation methods such as GC-MS.
Error 4: Ignoring cross contamination and cleaning processes
When testing different samples continuously, if the injection needle, liner, or extraction container is not completely cleaned, it can lead to contamination of subsequent low concentration samples with high concentration samples.
Correction method: After each sample is tested, rinse the injection system with high-purity solvent; Extraction bottles and pipettes should be dedicated or subjected to high-temperature baking treatment.
Error 5: Environmental and operator factors underestimated
The laboratory temperature and humidity fluctuate greatly, and the operators do not wear powder free gloves, which may introduce exogenous ortho benzene (such as from latex gloves or plasticizers in the air).
Correction method: Operate in a clean environment, use non ortho benzene experimental consumables, and strengthen personnel training and blank control experiments.
correct operationROHS2.0 ortho benzene testerIt is not only a technical issue, but also the core link of compliance management. Only by standardizing processes and paying attention to details can we ensure the authenticity and effectiveness of testing data and avoid trade risks.