Shalom Wangrangsimakul

3 Questions 6 Answers 0 Followers

Questions related from Shalom Wangrangsimakul

I have a question about using HPLC to measure ascorbic acid content in fruits. What do you think is the best way to get the AA peak to appear cleanly?

Hi,I have a question about using HPLC to measure the ascorbic content in fruit/vegetable samples. The samples are fruit/veg puree and are treated with metaphosphoric acid (and metaphosphoric acid...

07 July 2015 3,085 5 View

Is meta-phosphoric acid (s) stable enough for 1 month to be dissolved in de-ionised water and kept at -20degC in a centrifuge tube?

Breaking the meta-phosphoric acid crystals with a mortar and pestle, weighing, and then making sure all dissolves in water could be time consuming. Is it possible to prepare a large batch of the...

07 July 2015 5,748 1 View

Does anyone here has experience using UV-Vis spectrophotometry for the analysis of ascorbic acid and chlorophyll contents in plant samples?

1) Anyone here has experience using a UV-Vis spectrometer for the analysis of ascorbic acid and chlorophyll contents in fruit and vegetables samples? The usual equipment is the HPLC but I want to...

01 January 2015 2,318 9 View