gc model is Agilent 5890A, Shimadzu
gc 8A, operation smoothly, i can test samples on them, FID detector, change 4 times of spray tube of the detector, but the sensitive maybe not as good as Agilent 7890, or Shimadzu 2010
gc, but they are still stable and enough for testing my sample. that is inportant, i always buy columns from Tegent Guangzhou office, the quality is very good and stable. the sales guy is very smart and inteligent, he will send any promotion plan of their products to me and each time i will buy one or two columns with the promotion price. i feel very happy with their service and high quality products.