what is the relation between Total organic carbon and Chemical Oxygen demand?

2918

Why we use potassium dichromate in uv calibration Exact reason behind it??

1258

How is measurement of ph made?

1056

Name the element which has the following ground-state electron configuration: 1s22s22p6?

968

What is the application of hardness date in environmental engineering practice?

1408

Define:minerals and ores

2574

Why is ammonium hydroxide added to the brass solution?

1301

Tell me something about Vitamin A test method by HPLC

2679

For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?

2314

If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

856

What group of elements were called the inert gases?

1119

Why we are use glass viscometer, and what is calculation manual calculation formula as per USP. How many types of viscometre in glass type viscometer.

2345

Explain the process of obtaining Protactinium from its primary sources and its purification methods.

661

How does Protactinium contribute to our understanding of Earth's history and the behavior of elements in natural systems?

603

Why a1% value is used for some product ? What is the criteria for selection a1% value ?

2346