 确认方法：该方法借鉴ASTM F1929:2012的试验原理，使用

 Confirmation method: This method draws on the test principle of ASTM F1929:2012, and uses a test solution of dye + active agent to test the tightness of the product. Test solution configuration: Use 99.45% distilled water, 0.5% Triton X-100, and 0.05% toluidine blue to configure the test solution, and stir evenly. Take 30 samples for the test. <br>Fill the container used for the test with toluidine blue test solution, put 30 samples into the container, and immerse the whole sample in the toluidine blue test solution. Place the container with the sample in the vacuum box, evacuate the vacuum box to 35kPa±5kPa and keep it for 30 minutes; after returning to atmospheric pressure, keep it for another 30 minutes, then take the sample out of the container and rinse the sample with purified water , And wipe clean with absorbent paper. <br>Take two normal samples, place the sodium chloride injection in the syringe in a 1cm quartz absorption cell, and use the sodium chloride injection as a blank to measure the absorbance at a wavelength of 665nm with an ultraviolet-visible spectrophotometer. <br>Negative control: Take 3 syringes without immersing them in the staining solution as a negative control. <br>Positive control: Take 6 syringes with defective pistons and protective caps, mark them as positive leakage control samples, and test under the same conditions as normal samples. <br> Acceptance standard: the absorbance value of the syringe test liquid is between -0.003~+0.003

Confirmation method: This method draws on the test principle of ASTM F1929:2012, and uses the test liquid of dye and active agent to test the sealability of the product. Configuration of the test fluid: 99.45% distilled water, 0.5% quraton X-100, 0.05% toluene blue configuration test liquid, and stirred well. Take 30 samples for the test.<br>Fill the container used in the test with toluene blue test fluid, put 30 samples into the container, and completely immerse the whole sample in toluene blue test fluid. Place the container containing the sample in a vacuum box, vacuum the vacuum box to 35kPa±5kPa for 30 minutes, return to atmospheric pressure for another 30 minutes, then remove the sample from the container, rinse the sample with purified water and wipe it clean with absorbent paper. <br>Take two normal samples, place the sodium chloride injection in the syringe in a quartz absorption pool of 1cm, take the sodium chloride injection as blank, and measure the absorbent at wavelength 665nm with a UV visible phosphorescometer.<br>Negative control: Take 3 syringes, do not immerse in dyeing fluid, as a negative control.<br>Positive control: take 6 syringes with defective pistons and caps, do a good job of marking, make positive leakage control samples, and normal samples with the same condition test.<br>Acceptable standard: Syringe test fluid absorbance value between -0.003 and 0.003

Confirmation method: the test principle of ASTM f1929:2012 is used for reference, and the test solution of dye and activator is used to test the sealing property of the product. Configuration of test solution: 99.45% distilled water, 0.5% Triton X-100 and 0.05% toluidine blue were used to prepare the test solution, and the mixture was evenly stirred. 30 samples were taken for the test.<br>Fill the container used in the test with toluidine blue test solution, put 30 samples into the container, and completely immerse the whole sample into the toluidine blue test solution. Place the container containing the sample into a vacuum box, which is vacuumized to 35 kPa ± 5 kPa for 30 minutes; then the sample is removed from the container, washed with purified water, and wiped with absorbent paper.<br>Take two normal samples, put the sodium chloride injection in the syringe into a 1 cm quartz absorption cell, take the sodium chloride injection as blank, and determine the absorbance at the wavelength of 665 nm with UV visible spectrophotometer.<br>Negative control: take 3 syringes, do not immerse in dye solution, as negative control.<br>Positive control: take 6 syringes with defective piston and protective cap, mark them, make positive leakage control samples, and test with normal samples under the same conditions.<br>Acceptable standard: the absorbance value of syringe test solution is between -0.003 and + 0.003