The problem of solvent residue is a common problem in the quality of packaging bags. Soft packaging factories often encounter various problems during solvent residue testing. If not solved in a timely manner, it is easy to cause test result errors. The common problems and solutions are discussed below. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

1、 Peak value loss during calibration with standard samples: Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound patch machine, flexographic printing machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

1. The sampler is faulty, please verify with a new sampler. Web printing machine, bubble film machine, flexographic printing machine, envelope bag making machine, web printing machine, medical paper printing machine, roll cutting machine, bubble film machine

2. If the detector is not connected or not working, check the set value. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

3. The injection temperature is too low. Check the temperature and adjust it as needed. Web printing machine, bubble film machine, flexographic printing machine, envelope bag making machine, web printing machine, medical paper printing machine, roll cutting machine, bubble film machine

4. The temperature of the column box is too low. Check the temperature and adjust it as needed. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

5. No carrier gas flow rate, check the pressure regulator and check for leaks, verify the flow rate at the inlet of the column box.

6. If the column box is broken, it can be remedied if it is at the inlet end of the column box or the end of the detector. Cut off the broken part of the column box and reinstall it.

2、 The curve appears at the forefront of Ruiyite die-cutting machine, flexographic printing machine, stoma bag, heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound adhesive machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

1. Overloading of the column box reduces the amount of sample injection. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

2. Two compounds were co eluted to improve sensitivity and reduce injection volume, resulting in a temperature decrease of 10-20 degrees.

3. Sample condensation, check the temperature of the injection port and column box, and if necessary, increase the temperature.

4. Sample decomposition, lower the temperature of the sampler.

3、 The curve appears as a trailing peak. Ruiyite die-cutting machine, flexographic printing machine, stoma bag, heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound adhesive machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

1. The injector liner or column box has adsorbed active samples, and the liner should be replaced. If the problem cannot be solved, remove the intake end of the pillar box by 1-2 turns and reinstall it.

2. If the temperature of the column box or injector is too low, the temperature should be raised (do not exceed the maximum temperature of the column box). The temperature of the sampler should be 25 degrees higher than the highest boiling point of the sample.

3. Two compounds are co eluted to improve sensitivity, reduce injection volume, or lower temperature by 10-20 degrees to separate peaks.

4. The column box is damaged and should be replaced. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

5. Column box contamination should be removed from the inlet end of the column box by 1-2 turns before reinstallation.

4、 The curve only includes solvent Fengrui Yite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangrui De gravure printing machine, electronic shaft gravure printing machine, hydrocolloid printing machine, wound adhesive machine, flexographic printing machine, non-woven fabric bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

1. There is a problem with the sampler, and a new sampler should be used for verification. Web printing machine, bubble film machine, flexographic printing machine, envelope bag making machine, web printing machine, medical paper printing machine, roll cutting machine, bubble film machine

2. Incorrect carrier gas flow rate (too low), flow rate should be checked.

3. The sample is too thin, and a known sample should be injected to improve sensitivity or increase injection volume.

4. The temperature of the column box is too high. Check the temperature and adjust it as needed. Web printing machine, bubble film machine, flexographic printing machine, envelope bag making machine, web printing machine, medical paper printing machine, roll cutting machine, bubble film machine

5. The column box cannot resolve the components from the solvent peak, so replace the column box with a thicker coating or different polarity.

6. If there is a carrier gas leak, the leak should be checked (using soapy water). Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

7. The sample is adsorbed by the column box or injector liner, and the liner should be replaced. If the problem cannot be solved, remove 1-2 turns from the inlet end of the column box and reinstall it.

5、 The curve shows a wide solvent peak. Ruiyite die-cutting machine, flexographic printing machine, stoma bag, heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound adhesive machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

1. Due to improper installation of the column box, there is a dead volume at the injection port, and the column box should be reinstalled.

2. The injection technique is poor (too slow), and fast and stable injection techniques should be used.

3. The temperature of the sampler is too low, it should be increased. Web printing machine, bubble film machine, flexographic printing machine, envelope bag making machine, web printing machine, medical paper printing machine, roll cutting machine, bubble film machine

4. The sample solvent and detection interact with each other, and the sample solvent should be replaced.

5. There is residual sample solvent inside the column box, and the sample solvent should be replaced.

6. Improper cleaning of the spacer should be adjusted or cleaned. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

7. The diversion ratio is incorrect (insufficient diversion exhaust flow rate), and the flow rate should be adjusted.

6、 The curve shows a false peak. Ruiyite die-cutting machine, flexographic printing machine, stoma bag, heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid printing machine, wound adhesive machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

1. The column box should be used to adsorb samples, and the liner tube should be replaced. If the problem cannot be solved, remove 1-2 turns from the injection port end of the column box and reinstall it.

2. If the sampler is contaminated, try using a new sampler and clean solvent. If the false peak disappears, rinse the sampler several times.

3. The sample size is too large, and the injection amount should be reduced. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

4. Poor injection technology (slow injection): Using fast and stable injection technology.

7、 A well functioning column box appears with indistinguishable peaks, Ruiyite die-cutting machine, flexographic printing machine, stoma bag, heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

1. The temperature of the column box is incorrect, it should be checked and adjusted.

2. Incorrect carrier gas flow rate should be checked and adjusted.

3. The sample injection volume is too large and should be reduced. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

4. The level of injection technology is too poor (injection is too slow), and fast and stable injection technology should be used.

5. The column box and liner are contaminated, and the liner should be replaced. If the problem cannot be solved, remove 1-2 turns from the inlet end of the column box and reinstall it.

8、 Irregular or unstable baseline Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel patch, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound patch machine, flexographic printing machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

1. The column box is contaminated and the lining should be replaced. If the problem cannot be solved, remove 1-2 turns from the inlet end of the column box and reinstall it.

2. If the detector or injector is contaminated, the detector and injector should be cleaned. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

3. If there is a carrier gas leak, the spacer should be replaced and the column box should be checked for leaks. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine

4. The carrier gas control is not coordinated, and it is necessary to check whether the carrier gas source pressure is sufficient. If the pressure is ≤ 500psi, please replace the gas cylinder.

5. If there are impurities or air path pollution in the carrier gas, the gas cylinder should be replaced and the metal tube should be cleaned using a carrier gas purification device.

6. The carrier gas flow rate is not within the maximum or minimum limit range of the instrument. The flow rate should be measured and verified according to the technical specifications in the user manual.

7. If there is a problem with the detector, it should be checked according to the instrument manual. Web printing machine, bubble film machine, flexographic printing machine, envelope bag making machine, web printing machine, medical paper printing machine, roll cutting machine, bubble film machine

8. The injector spacer is lost and should be replaced. Ruiyite die-cutting machine, flexographic printing machine, stoma bag heel sticker, Kangruide gravure printing machine, electronic shaft gravure printing machine, hydrocolloid machine, wound sticker machine, flexographic printing machine, non-woven bag making machine, roll paper printing machine, medical paper printing machine, roll cutting machine