... Test KitModel: LH-P09Type: semi-quantitativeColor reaction: none color -pinkReference point: 0.002mg/LPackaging detail: 50tests/boxShelf life: at ... international standards and methods;Produced from imported materials, including color agent, buffer agent, spiking agent, and covering agent, ... minutes.4. Compare the shown color of tube2 with tube 1, if the color is lighter than tube1, concentration ...