1. p. 1 FAQs- before analyzing your sample

2. p. 2  Temperature (thermal degradable?)  Split or splitless  Split ratio  Injection volume FAQs- injection port

3. p. 3 Split/splitless injection port

4. p. 4  Column selection Polarity (DB5-ms, DB-17, DB-Wax) Chirality (HP-Chiral ß column) cis/trans form (HP-88)  Length of column H = L/N FAQs –column and oven

5. p. 5 FAQs-peaks

6. p. 6 Experimental resolution

7. p. 7 van Deemter equation

8. p. 8 FAQs-peaks

9. p. 9 FAQs-peaks

10. p. 10 FAQs-peaks

11. p. 11 Detection limit for trace analysis LOQ MDL

12. p. 12 Detection limit for trace analysis MDL

13. p. 13 Detection limit for trace analysis Limit of linearity (LOL) Limit of quantitation (LOQ) Method detection limit (MDL)

14. p. 14  Retention time only Dual column with certify reference materials  Retention time with mass spectrum Identification power of ion (at least 4) MS: 1 IP MS/MS and HR MS: 2 IP FAQs –qualification

15. p. 15  Quality assurance systematic processes that provide confidence in a suitability of analytical process for its intended purpose. Blank (field, reagent, matrix) Calibration check sample FAQs –QA/QC

16. p. 16  Quality control systematic processes that ensure test results are designed and produced to meet the requirements Spike Duplicate Spike duplicate FAQs –QA/QC

17. p. 17  Reagent blank  Calibration C 1 -C 5 (at least 5 points within 1 order)  Calibration check CK 1  Sample S 1 -S n ( ≦ 10 for environmental analysis, ≦ 20 for common practice)  Spike SK 1  Duplicate D 1  Spike duplicate sample SD 1  Sample S n+1 -S 2n  Spike SK 2  Duplicate D 2  Spike duplicate sample SD 2  Calibration check CK 2 FAQs –sequence

18. p. 18  An internal standard in analytical chemistry is a chemical substance that is added in a constant amount to samples, the blank and calibration standards in a chemical analysis.  This substance can then be used for calibration by plotting the ratio of the analyte signal to the internal standard signal as a function of the analyte concentration of the standards. FAQs –internal standard

19. p. 19  This is done to correct for the loss of analyte during sample preparation or sample inlet. The internal standard is a compound that matches as closely, but not completely, the chemical species of interest in the samples, as the effects of sample preparation should, relative to the amount of each species, be the same for the signal from the internal standard as for the signal(s) from the species of interest in the ideal case.  Adding known quantities of analyte(s) of interest is a distinct technique called standard addition, which is performed to correct for matrix effects. FAQs –internal standard