This study conducted frequency analysis, reliability analysis, descriptive statistics, and correlation analysis to determine the impact of quality control managers' perception and implementation of KS certification factory inspection evaluation items on follow-up management. Through a multiple linear regression model, the influence of KS certification officer's awareness and implementation of KS certification factory inspection on post management was found to have a positive (+) influence on post management, with implementation having a greater influence on post management than awareness. It was having an impact. The independent variable (perception) has a statistically significant impact on the mediating variable (execution), and in the stage of verifying the mediating effect, the influence of the independent variable (perception) on the dependent variable (follow-up management) has a statistically significant impact. , In the stage where the independent variable (perception) and the mediator (implementation) are input simultaneously, both the independent variable and the mediator have a statistically significant effect on the dependent variable, indicating that there is a mediation effect.

In this study, the QA/QC test for the combined application of DNPH cartridge – HPLC/UV method was investigated in the collection and analysis of formaldehyde in air using three types of DNPH cartridge samplers made by three independent manufacturers. For these experiments, gaseous standards of formaldehyde (FA) were prepared at 7 concentration levels that fell in the range of 44.1~3400 nmol/mol. According to our analysis, the levels of cartridge blank (0.13 ~ 0.26 ng) are found to be fairly high to require routine check up for each experiment. The recovery patterns of FA were highly comparable between different cartridge products, when standard gases are supplied in the concentration range up to 177 nmol/mol. All 3 types of DNPH cartridge exhibited highly similar recovery rates at concentrations below 1.7 ㎛ol/mol, while the maximum recovery was attained from the product B. The overall results of our study suggest that one should calibrate the samples in the optimal range of recovery with routine check up of blank values.