Analysis of Factors Affecting the Chemical Composition Results of Phosphorus and Sulfur Elements in Sucker Rods

The sources of uncertainty in the determination of phosphorus and sulfur in sucker rod by spectrograph are analyzed, the mathematical model is established, and the uncertainty of the determination result is evaluated. In order to improve the accuracy of the chemical composition analysis results of phosphorus and sulfur elements in the sucker rod bell, the environment, power supply, argon, analysis sample, standard sample, control sample, electrode, spark table, condenser and personnel were analyzed, and the countermeasures were formulated. The uncertainty assessment provides a reliable reference basis for improving the laboratory detection and control ability, and the analysis of influence factors and countermeasures provide a reference for improving the accuracy and reliability of the analysis results of phosphorus, sulfur and other elements.