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- Posts: 110
- Joined: Fri Aug 07, 2009 1:40 pm
I have exam so please help me. Now, what is the different between ( certified reference material) and reference materials ?.
My examiner will ask did you use reference material ?
Ok, at the start of my work, i have three bottle ordered from sigma Aldrich for three cmpounds ( insecticide ) its purity is written like 99 % , 95 % , 99% . All i do i prepare my stock like ( 1 g in 100 ml methanol ) now i have 10,000 mg/l stock solution of my compound then i diluted to make my working standards.
Is this called reference standard or certified reference standard. Shall i said yes i used reference standard or what i say ? i really confuse but i think the certified standard is ready prepared standard like 100 ppm from my compound that come through several authority , iso etc , but what i did called .
sorry i talk a lot but u hope u help me..
By the way i need any thing help me understand the (( the quality control people mind )) what type of question they will ask ,, i am in my Master ohh.
I am using HPLC , AND I ONLY PREPARE MY STOCK AS I SAID PREVIOUSLY
thanks