Pesticides, EPA Methods, GC-ECD

Wish one month later, will have a new Toy in the Lab --- Micro-ECD.
Agilent 6890 Micro-ECD: G1530A Option 231, G1540N Option 231,G2397A .


(1)666, DDT: Organochlorine Pesticides, EPA Method 508 AND EPA Method 525.2 (2) ACEPHATE: EPA 40 CFR 180.108, CASRN 30560-19-1
(3)METHAMIDOPHOS:
(4)PARATHION :Organophosphorous Pesticides,EPA Method 8141A.

(5)PCNB: Pentachloronitrobenzene

In Grave Grief, China Mourns Quake Dead

I love my country "CHINA" SO MUCH, that is my Mother Land......

Actually, I don't like to put any non-Quality Control topic (HPLC,GC-MS/MS, ICP/AA, FT-IR) on my Chemistry Blog.
Now because I am a Chinese: I love my country "CHINA" SO MUCH, that is my mother land.

Glucosamine (C6H13NO5) : Glucosamine HCL/Glucosamine Sulfate

Glucosamine (C6H13NO5) is an amino sugar and a prominent precursor in the biochemical synthesis of glycosylated proteins and lipids.

General HPLC Assay@ C18, 4.6x250 mm, 5um.
Mobile Phase: .1 % H3PO4, ACN
Detector Wavelength: 240 nm or 254 nm.

However, could not get a good chromatogram profile.

So low down the H3PO4 to .05%, use NaOH to adjust pH to 3.0, use the 190 wavelength........ Wow..... It works...
So here is a question: How to use the US Pharmacopoeia? 100% follow or made some adjust according your own specific lab facility ?