What Is A Capillary Column And Types Of Capillary Columns?

A capillary column for GC is fundamentally a very slender tube with the fixed phase veneering the internal surface. In packed columns the static phase is glazed onto the packing elements. A capillary column comprises of a couple of sections – the tubing and stationary phase.

Fused silica and stainless steel are the chief tubing ingredients. Moreover there are plenty of stationary phases- such as high molecular weight, thermally balanced polymers that are liquids or gels. But the most commonly seen stationary phase are polyethylene glycols, polysiloxanes and some tiny permeable elements constituted of polymers or zeolites.


In gas chromatography, mainly three types of capillary columns are used.

Wall Coated Open Tubular (WCOT)
Surface Coated Open Tubular (SCOT)
Fused Silica Open Tubular ( FSOT)

Wall Coated Open Tubular (WCOT)

Here in the interior wall of the capillary column is layered and veneered with a very fine layer of fluid stationary phase.

Surface Coated Open Tubular (SCOT)

The capillary tube wall is layered with a skinny strata of solid balance on to which fluid phase is immersed. The separation efficiency of SCOT columns is higher than WCOT columns due to the enhanced surface domain of the stationary phase layer.

Fused Silica Open Tubular (FSOT)

Walls of capillary fused silica tubes are reinforced by a polyimide coating. These are malleable and can be twisted into coils.

Uses of Capillary Column in GC

Gas Chromatography is a universally used analytic procedure in many scientific research and industrial laboratories for quality analysis as well as recognition and quantitation of composites in a blend. GC is also a regularly used technique in many ecological and forensic labs because it permits for the exposure of very tiny volumes and quantities.

A wide variety of tasters can be investigated as long as the compounds are appropriately thermally balanced and rationally unstable. In all gas chromatography analysis, the separation of various compounds happens because of their collaboration with the stationary and mobile stages. Such as in simple chromatography a solvent (water and alcohol.) drifts over the paper (stationary) flowing the sample with it.

Principle of Operations

The diverse compounds which constitute the sample will drift more or less sluggishly depending, in simple terms, on how much they cling to the paper. The stickier amalgams move more unhurriedly therefore move a smaller distance in a stipulated time subsequent result being separation.

In gas chromatography the gas is the mobile stage, the column veneer is the stationary stage and the boiled element is alienated by how long the essential compounds take to appear from the other terminal of the column and flow into the detector. This is known as the retention time.

One can acquire columns layered with various stationary phases banking on what type of compounds one wishes to examine as the type of stationary section will regulate which compounds pass over it faster or slower.

Supporting Education Through Mid-Day Meals

Many children in India (belonging to low-income families) find themselves thrown into the real-world battles quite early in life. In a country where Right to Education is a law, as many as 126,66,377 children work in various sectors only to earn their meal for the day. Yet, a change has been brewing steadily where children today are opting education over work.

Every Child Must be Educated

Earlier, many families considered a child to be an additional resource to fetch income to feed the family and to feed the children. This has considerably changed over the years. Thanks to the initiatives and schemes by the Government of India, many children are now encouraged to attend school. Additionally, when the children started to benefit from mid-day meal schemes in schools, they started bringing along their siblings which solved the problem of most parents.

The Changes over the Years

The 1998 National Census of India estimated the total number of children workers, aged 4-15, to be at 12.6 million, out of a total child population of 253 million in 5-14 age group. The 2011 National Census of India found the total number of working children, aged 5-14, to be at 4.35 million, and the total child population to be 259.64 million in that age group. So yes, the numbers have declined but the problem of putting children to school remains to be solved.

A National Policy on Child Labour was formulated in 1987 and ever since, the government has tried to ensure children attend school. One of the more remarkable steps of the government has been the enactment of ‘The Right of Children to Free and Compulsory Education Act’ or Right to Education Act also known as RTE. It was enacted on August 4 2009, which describes the modalities of the importance of free and compulsory education for children between 6 and 14 in India under Article 21A of the Indian Constitution. In addition, the government set off to accelerate the various policies about children’s education in its existing system.

One such step was the launching of Mid-Day Meal Scheme in 2004. This scheme has seen several reforms over the years with a view to include all of government schools in the system. The primary objective of Mid-Day Meal Programme is to feed one wholesome meal to children in order to encourage them to come to school. The government has tied up with non-governmental organisations in order to implement MDMS efficiently in schools to reach out to as many children as possible.

Benefits of Mid-Day Meal Programme

Children are now encouraged to attend school and this has so far proved to be a win-win for parents belonging to economically weaker sections. The parents are now realising that they can feed the children by relying on school lunch programmes. The Mid Day Meal Scheme has benefitted the children in more ways than one. Properly-fed children feel more motivated to work hard on their academics, experience an overall physical and mental growth and understand the importance of having ambitions for future.

Grammar Schools Are Back in Focus

The ongoing battle of words between Piers Morgan and Virender Sehwag seems to be reaching new heights, at least as far as Piers Morgan is concerned. The man may be quick to admonish anyone who doesn’t ‘dot their I’s or cross their T’s but his insistence on grammatical sentencing and spelling is not going down well with a lot of people. The poor ‘bard’ must be literally shaking in his grave!

English is a funny language, we have heard many say. And indeed it is through its nuances of sounds and spellings that can throw even the most seasoned off-guard. But without doubt English is one of the most widely spoken languages and easily the most popular for communication at international levels.

The new British Prime Minister, Theresa May recently announced a huge reform to the UK education policy by calling for a new generation of selective schools. She has vowed to bring in legislation to overturn the ban on new grammar schools, a policy which has been in effect since 1998. Grammar schools have had a dubious distinction of taking up for the higher echelons of society.

But first, let’s understand what a ‘Grammar School’ is.

A grammar school is that which selects its students through an examination called the ’11-plus’, which means that children of that age take the exam. By virtue of this, it attains a special status. Under the system, a child who passes the exam is eligible to attend the local grammar school while a child who fails goes to the ‘secondary modern school’. In certain boroughs and counties in the UK there are no grammar schools which are non-selective with no special status although they bear the name of a grammar school.

The modern school was made effective through the Education Act of 1944 although the concept of these schools goes way back to the 16th century. Secondary Education was reorganized into two types namely grammar school education and secondary schools. Through the former it was assumed that pupils would move on to higher studies by focusing on academics while the latter was meant for those children who would take up a trade or technical jobs. It basically segregated those that would go on to university studies and celebrated professions and those who seemed more suitable for lesser jobs.

The selection for grammar school put the students through the ’11-plus’ which is taken by them during the final year of primary school. The entrance exams consist of all or some of the following categories –

• Verbal reasoning
• Non-verbal reasoning
• Numerical reasoning
• English comprehension and grammar
• Creative writing

Most parents pay for expensive tutors in order that their children pass the exams and get a better education; facts point out that those kids who have been intensively tutored do fare very well.