Cola drinks

C8H10N4O2. An alkaloid occurring in tea, coffee and guarana, from which it may be prepared by extraction, It is also manufactured by the methylation of theobromine and by the condensation of cyanoacetic acid with urea. Crystallizes with H2O or anhydrous from organic solvents. M.p. (anhydrous) 235"C, sublimes at 176 C. Odourless, and with a very bitter taste. Caffeine acts as a stimulant and diuretic, and is a constituent of cola drinks, tea and coffee. 

Acidic and basic household solutions. Many common household items, including vinegar, orange juice, and cola drinks, are acidic. In contrast baking soda and most detergents and cleaning agents are basic. 

A pH meter with a digital readout. With a pH of 3.12. cola drinks are quite acidic. 

Phosphoric acid, a common ingredient of cola drinks, is triprotic ... 

Figure 5. Profile of cola drink in Lopac and glass containers...

ENHANCING SLEEP PATTERNS. To promote the effects of the sedative or hypnotic the nurse provides supportive care, such as back rubs, night lights or a darkened room, and a quiet atmosphere. The patient is discouraged from drinking beverages containing caffeine, such as coffee, tea, or cola drinks, which can contribute to wakefulness. 

When use of the CNS stimulants causes insomnia, the nurse administers the drug early in the day (when possible) to diminish sleep disturbances. The patient is encouraged not to nap during the day. Other stimulants, such as coffee, tea, or cola drinks, are avoided. In some patients, nervousness, restlessness, and palpitations may occur. The vital signs are checked every 6 to 8 hours or more often if tachycardia, hypertension, or palpitations occur. Many times these adverse reactions will diminish with continued use as tolerance develops. If tolerance develops, the dosage is not increased. 

Advises to avoid other stimulants, including those containing caffeine such as coffee, tea, and cola drinks provides a written list of foods to avoid. 

GA is used as an emulsifier in beverages such as citrus juices, beer, and cola drinks. GA ability to stabilize foams is used in the manufacture of beer and soft drinks. Besides, it can be used for clarifying wines. 

Caffeine contained in tea beverage is absorbed at about the same rate as caffeine in coffee, cola drinks, or in pure water. Data to support this conclusion was obtained in a human feeding experiment.109 The theory that complexation of caffeine with the polyphenolic material in tea retards absorption110-111 is not borne out. 

Hydrogen peroxide was determined with fmol detection limits by using rhodamine 6G and pyrimidopyrimidine derivatives as fluorescent enhancers. The method employing the latter reagent was applied to cola drinks [92], Sensitive... 

Abstract Caffeine, a xanthine alkaloid, occurs in teaplants, coffee, mate leaves and cola nuts, ft is also commonly found beverages, such as cola drinks, tea and energy drinks. 

Simultaneous Spectrophotometric Determination of Food Additives (Benzoie Aeid, Caffeine, Aspartame and Aeesulfame-K) in Cola Drinks by PLS Multivariate Calibration Method... 

The method involves the use of 27 standard mixtures of the fom compounds assayed, considered at three concentration levels and measured of samples in a 0.1 N H PO. The designed and optimized training set of calibration was applied to the determination of four food additives in several synthetic mixtmes. Three commercial cola drinks (coca-cola, pepsi-cola, cola-turka) that contained the fom additives were also satisfactorily analyzed without separation step. 

Keywords Cola drinks, food additives, spectrophotometry, sweeteners... 

In this present work, an alternative PLS-2 method was investigated and applied to the determination of sodium benzoate (itsed for preservatives) artificial sweeteners Aspartame, Acesitlfame-K and caffeine in diet cola drinks. 

All chemicals and solvents used were analytical and spectroscopic grade. The sweeteners (aspartme, acesulfame-K), caffeine and sodium benzoate were obtained from Ulker Food Compai f, Turkey. Cola drinks were purchased from local markets. Stock solutions of 100 mL of Aspt, Ace-K, Caf and Na-Benz were prepared in 0.1 N H PO. 0.1 N H PO solution was prepared by diluting 9.09 mL orthophosphoiic acid (85%) to 1,000 mL. 

Some cola drinks containing Aspt, Ace-K, Caf and Na-Benz were analyzed Coco-Cola (light) Pepsi (light) and Cola-Turka (light).The amount of Aspt in these samples ranged between 0.2 g/L and 0.35 g/kg, Ace-K 0.2 g/L and 0.09 g/kg and Caf 0.15-0.1 g/L and 0.12 g/kg Sodium benzoate, orthophosphoiic acid, and citric acid were also present in the samples. 

The diet cola drinks were degassed 10 min in an ultrasonic bath and diluted 60-fold in 0.1 N HjPO. In 10 mL volumetric flasks, an aliquot (0.35-0.4 mL) of the pretreated sample of cola drink was introduced, and then diluted to the mark with 0.1 N HjPO. The electronic absorption spectrum was recorded from 190-300 nm against a blank of 0.1 N H PO. ... 

Phosphoric acid, H3PO4, is one of the world s most important industrial chemicals. It is mainly used to manufacture phosphate fertilizers. It is also the ingredient that gives cola drinks their tart, biting taste. Calculate the pH, [H2PO4-], and [HP04 ] of a 3.5 mol/L aqueous solution of phosphoric acid. 

It has been estimated that beverage consumption may provide the following amounts of caffeine per cup or average measure coffee, 30-150 mg (average 60-80 mg) instant coffee, 20-100 mg (average 40-60 mg) decaffeinated coffee, 2-4 mg tea, 10-100 mg (average 40 mg) cocoa, 2-50 mg (average 5 mg) cola drink, 25-60 mg. The maximal daily intake should not exceed about 1 g to avoid unpleasant side effects, e.g. headaches, restlessness. An acute lethal dose is about 5-10 g. 

A cnp of coffee can contain 50-150 mg of caffeine, and cola drinks can have 35-55 mg. Theophiline,l,3-dimethylxanthine, a principal, characteristic alkaloid of tea, and theobromine, 3,7-dimethylxanthine (23.3.19), a principal alkaloid of cocoa, are among a number of methylxanthines. In small doses, caffeine is a relatively weak psychostimulant and is used for increasing awareness as well as for relieving headaches associated with blood flow disorders of the brain. Caffeine has a stimulatory effect on the respiratory and vasomotor centers, and it stimnlates centers of the vagus nerve. It has a direct stimulatory effect on the myocardium, and in large doses can cause tachycardia and arrhythmia. 

The US Food and Drug Administration classifies caffeine as generally recognized as safe (GRAS). This designation means that there are sufficient data and history of use to indicate that caffeine is safe to consume in the amounts commonly found in foods and beverages. The FDA allows caffeine to be added to cola drinks. 

To Color Cola Drinks. When viscous corn syrup is heated it caramelizes (turns a deep dark brown). However, if it is heated a bit too long it transforms into carbon... 

Three xanthines are pharmacologically important caffeine, theophylline, and theobromine. All three alkaloids, which occur naturally in certain plants, are widely consumed in the form of beverages (infusions or decoctions) derived from these plants. Coffee primarily contains caffeine (about 100-150 mg per average cup) tea contains caffeine (30-40 mg per cup) and theophylline and cocoa contains caffeine (15-18 mg per cup) and theobromine. Cola drinks also contain significant amounts of caffeine (about 40 mg/12 oz). The CNS stimulation associated with these beverages is predominantly due to the caffeine. 

Avoid coffee and cola drinks while chewing gum or using inhaler... 

---