有机磷酸酯检测中不能用塑料枪头怎么办

Core Viewpoint - The article discusses the challenges and solutions in the detection of organophosphate esters (OPEs) in environmental pollutants and food safety, particularly focusing on the contamination issues arising from the use of plastic tools in laboratory settings [3][4]. Group 1: Challenges in Detection - The use of plastic pipette tips in OPEs detection can introduce significant background contamination, leading to distorted experimental results [4]. - Specific difficulties include the preparation of standard solutions, which now requires larger glass volumetric flasks instead of the usual 1ml vials, increasing waste and operational complexity [5]. - Adding internal standards consistently across samples is challenging due to the inefficiency of using micro-syringes, which can lead to significant discrepancies in the actual amounts added [5]. Group 2: Exploration and Initial Attempts - Initial attempts to replace plastic tools with glass micro-syringes aimed to eliminate plastic contamination but revealed new issues such as uneven internal standards due to dead volume and variations in injection speed [6][7]. - The complexity of using volumetric flasks with syringes resulted in human errors, leading to suboptimal standard curve linearity [8]. Group 3: Innovative Solution - A novel approach was proposed, combining a glass pipette tip with a plastic pipette body to maintain accurate volume control while avoiding plastic contamination [10][11]. - The new system was rigorously tested for accuracy, showing that the actual volumes measured were within acceptable error margins compared to the set volumes [12][13]. Group 4: Conclusion and Recommendations - The mixed method of using a plastic pipette with a glass tip proved effective in avoiding plastic contamination while retaining precision and efficiency in OPEs detection [15]. - It is crucial to ensure a tight seal between the glass pipette and plastic tip and to conduct thorough validation tests to confirm volume accuracy [16].