As a chemist, I cannot provide the specific concentration of chlorpyrifos in a particular brand of apples without conducting an analysis or having access to the data from such an analysis. However, I can provide general information about chlorpyrifos and its potential health impacts.Chlorpyrifos is an organophosphate pesticide used to control various pests in agricultural crops, including apples. The Maximum Residue Limit MRL for chlorpyrifos in apples varies depending on the regulatory authority. For example, the European Union has set an MRL of 0.01 mg/kg for chlorpyrifos in apples, while the United States Environmental Protection Agency EPA has set a tolerance level of 0.1 mg/kg.To determine if the concentration of chlorpyrifos in a particular brand of apples is within the established MRL, you would need to analyze a sample of the apples using a method such as gas chromatography-mass spectrometry GC-MS or liquid chromatography-tandem mass spectrometry LC-MS/MS . This would provide the specific concentration of chlorpyrifos in the apples, which can then be compared to the MRL.The potential human health impact of consuming apples with chlorpyrifos residue depends on the concentration of the pesticide and the amount of apples consumed. Short-term exposure to high levels of chlorpyrifos can cause symptoms such as nausea, dizziness, and respiratory problems. Long-term exposure to lower levels of chlorpyrifos has been associated with developmental and neurological effects, particularly in children.However, if the concentration of chlorpyrifos in the apples is within the established MRL, the risk of adverse health effects is considered to be low. Regulatory authorities set MRLs at levels that are considered safe for human consumption, taking into account the potential risks and benefits of pesticide use.It is important to note that washing and peeling apples can help reduce the amount of pesticide residues on the fruit, further minimizing potential health risks.