HPLC method validation?

Dear Dr's and researchers what is the best parameters to make method for a new Schiff base derived from benzocaine?

10 November 2018 6,738 8 View

2-AZETIDINONE preparation from Schiff base?

are their any chemical compound that used to synthesis 2-AZETIDINONE from Schiff base other than chloroacetyl chloride?

10 November 2017 6,314 4 View

Schiff base preparation?

Dear Dr's I prepare Schiff base; firstly lemons color appear, after 4 hrs "i forget it more than 1 hour" the color change to brown; are their a relationship between time and color?

09 October 2017 2,708 6 View

Molar ratio?

anyone can help me to use conductivity method to determine molar ratio of Schiff base-metal complex? i need reference please?

04 May 2017 755 0 View

How i can separate phosphogypsum chemically?

How i can separate phosphorous from gypsum?

02 March 2017 7,470 1 View

Sodium borohydride?

Dear Dr's: I would like to ask about the effect of NaBH4 on a schiff base have an ester group; does the ester affected by NaBH4?

01 February 2017 5,358 4 View

White Schiff base ?

Are their a Schiff base with white color?

11 December 2016 7,243 1 View

Indicator film used to detect some metals by make complexation with it?

09 October 2016 7,036 3 View

Is carbonic acid an organic acid or an inorganic acid?

if i say H2CO3 ( called carbonic acid) does'n exist but it is a solution of CO2 dissolve in water and both of them are inorganic compounds so it is an inorganic compound???

10 November 2015 9,376 3 View

Dear Dr's i hope to aske about fluorescence?

01 January 1970 2,732 3 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Can anyone help me with the administration of the "Mind the Gap" Scale for satisfaction with transition to adult care?

We are working on a study focused on adolescents' transition to adult care and are looking for a validated measure for satisfaction with the transition. So far the only measure that we have came...

28 February 2021 2,338 1 View

Which transition metal salt precursor is best for doping? Why?

I would like to synthesize a transition metal doped TiO2 via solgel method. Hence, I would like to know which metal salt precursor to choose among Chloride, Nitrate, and Sulphate. A clear...

27 February 2021 4,285 3 View

Multinomial probabilities and confidence intervals - obtaining the CI of the reference category?

Hi, Some background to my question: I have fitted 1st order multinomial Markov models with covariates. Since all probabiilties (for each row of the transition matrix) sum to 1, I estimate only...

22 February 2021 2,541 4 View

Alternative to mediation analysis?

I am currently working on my dissertation and want to explore the role of competence as a mediator between the effect of colour of clothes on voting intention (focus on Western countries)....

21 February 2021 8,609 1 View

Color of spiro-ometad film?

What does the color of a spiro-ometad film indicate? I got purple, green, red, even black color of the spiro film. Is there anything we can get from the preliminary color analysis(e.g. oxidation...

21 February 2021 1,831 4 View

Could the "incoming radiation (net radiation)" values be negative?

Could the "incoming solar radiation" values be negative? What is the difference between "global solar radiation" and "incoming solar radiation"? Which one might be measured negative values?

21 February 2021 7,726 9 View

In methylene blue test Why is UV absorbance reading very low as soon adsorbent is added and then increasing before reaching equilibrium?

Hello, I'm working on removal of methylene blue. 01. in the dark test very first reading is taken 15 minutes after adding adsorbent to the dye solution and that UV absorbance reading is very...

19 February 2021 472 5 View

What is the detection limit of ED-XRF technique for transition metals in silicon ?

Hi everybody, please, can someone tell us if the transition metals (W, Fe, Ni, etc ...) in silicon destined for solar cell manufacturing can be detected by ED-XRF technique. Note that the...

18 February 2021 6,231 4 View