甲醛检测仪ppm htv的对比实验

       甲醛检测仪ppm htv的对比实验
　　Table 1. Formaldehyde Method Characteristics

*60 seconds in high accuracy mode and 8 seconds in low accuracy mode. For this study, the PPM was in high accuracy mode. Description of the Direct-Reading Instruments and Laboratory-Based Method The RKI Instruments Model FP-30 uses photoelectric photometry with colorimetric detection tabs to measure formaldehyde in air (RKI Instruments Inc., Hayward, California) (Figure A-1 in Appendix). The RKI Instruments Model FP-30 draws in air with an internal pump and uses a microprocessor to control sample flow rate. The instrument uses detection tabs to sample airborne formaldehyde. Depending on the desired detection range, a particular tab number is used during sampling. For this study, number 009 detection tabs were used to measure formaldehyde concentrations ranging from 0 to 1.00 ppm in a 15-minute sampling time. The instruction manual states the RKI Instruments Model FP-30 is capable of measuring formaldehyde concentrations ranging from 0 to 1.00 ppm with a resolution of 0.01 ppm. According to the manufacturer, measurements are accurate to ± 10% when air temperature is between 14ºF and 104ºF and the relative humidity is below 90%.