Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

introduction to Quality Control 1, Study notes of Pharmaceutical Analysis

This will help you in Quality Control 1

Typology: Study notes

2020/2021

Uploaded on 02/22/2022

jyreen-maika-maningo
jyreen-maika-maningo 🇵🇭

5

(1)

5 documents

1 / 13

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Pharmaceutical Analysis
• It is the series of processes that are used for identification, determination, separation,
purification, and structure elucidation of the given compound used in the formulation of
pharmaceutical products.
• The components, to which the pharmaceutical analysis is done, are normally active
pharmaceutical ingredients, pharmaceutical excipients, contaminants present in
pharmaceutical products, or drug metabolites.
Emphasis is placed on discussing the principle of quantitative pharmaceutical chemistry and the
different methods of analysis employed so students will be able to apply this concept in establishing
the quality and purity of raw materials, food, drugs and drug products to ensure the health of the
society
According to RA 10918
Pharmaceutical products refer to drugs, medicines, biologicals, pharmaceutical and
biopharmaceutical products/ specialties, veterinary products, veterinary biologies and veterinary
medicinal products;
Drugs refer to pharmaceutical products that pertain to chemical compounds or biological
substances, other than food, intended for use in the treatment, prevention, or diagnosis of disease
in hiunans or animals, including the following.
Active Pharmaceutical Ingredient (API)
- Any substance intended to be used in the manufacture of a medicinal product and that, when so
used, becomes an active ingredient of the medicinal product.
Accdg to European Pharmacopeia :
- An herbal medical product is a medicinal product, exclusively containing as active ingredients one
or more herbal drugs or one or more herbal drug preparations, or one or more such herbal drugs in
combination with one or more such herbal drug preparation.
- An excipient any constituent of a medicinal product that is not an active substance. Adjuvants,
stabilizers, antimicrobial preservatives, diluents, antioxidants, for example, are excipients.
Pharmaceutical quality assurance (QA)—Sum of all activities and responsibilities required to ensure
that the medicine that reaches the patient is safe, effective, and acceptable to the patient
Pharmaceutical quality control—Process concerned with medicine sampling, specifications, and
testing, and with the organization’s release procedures that ensure that the necessary tests are
carried out and that the materials are not released for use, nor products released for sale or supply,
until their quality has been judged satisfactory
Poor quality medicines do not meet official standards for
Strength
Quality
Purity
Packaging
Labeling
pf3
pf4
pf5
pf8
pf9
pfa
pfd

Partial preview of the text

Download introduction to Quality Control 1 and more Study notes Pharmaceutical Analysis in PDF only on Docsity!

Pharmaceutical Analysis

  • It is the series of processes that are used for identification, determination, separation, purification, and structure elucidation of the given compound used in the formulation of pharmaceutical products.
  • The components, to which the pharmaceutical analysis is done, are normally active pharmaceutical ingredients, pharmaceutical excipients, contaminants present in pharmaceutical products, or drug metabolites. Emphasis is placed on discussing the principle of quantitative pharmaceutical chemistry and the different methods of analysis employed so students will be able to apply this concept in establishing the quality and purity of raw materials, food, drugs and drug products to ensure the health of the society According to RA 10918 Pharmaceutical products refer to drugs, medicines, biologicals, pharmaceutical and biopharmaceutical products/ specialties, veterinary products, veterinary biologies and veterinary medicinal products; Drugs refer to pharmaceutical products that pertain to chemical compounds or biological substances, other than food, intended for use in the treatment, prevention, or diagnosis of disease in hiunans or animals, including the following. Active Pharmaceutical Ingredient (API)
  • Any substance intended to be used in the manufacture of a medicinal product and that, when so used, becomes an active ingredient of the medicinal product. Accdg to European Pharmacopeia :
  • An herbal medical product is a medicinal product, exclusively containing as active ingredients one or more herbal drugs or one or more herbal drug preparations, or one or more such herbal drugs in combination with one or more such herbal drug preparation.
  • An excipient any constituent of a medicinal product that is not an active substance. Adjuvants, stabilizers, antimicrobial preservatives, diluents, antioxidants, for example, are excipients. Pharmaceutical quality assurance (QA)—Sum of all activities and responsibilities required to ensure that the medicine that reaches the patient is safe, effective, and acceptable to the patient Pharmaceutical quality control—Process concerned with medicine sampling, specifications, and testing, and with the organization’s release procedures that ensure that the necessary tests are carried out and that the materials are not released for use, nor products released for sale or supply, until their quality has been judged satisfactory Poor quality medicines do not meet official standards for ✓ Strength ✓ Quality ✓ Purity ✓ Packaging ✓ Labeling

Reasons of Pharmaceutical crimes: ● availability of substandard and counterfeit drugs in disturbing proportion in many low- & middle- income countries (LMIC) ● lack of reliable drug quality assurance systems in many developing countries Determinants of Medicine Quality ● Identity: Active ingredient ● Purity: Not contaminated with potentially harmful substances ● Potency: Usually 90–110% of the labeled amount ● Uniformity: Consistency of color, shape, size ● Bioavailability: Interchangeable products? ● Stability: Ensuring medicine activity for stated period Identity, purity, potency, uniformity are defined in pharmacopoeias and stated in certificate of analysis (COA) Who Ensures Medicine Quality? ● Drug regulatory authority ● Drug and therapeutics committee ● Hospital procurement office ● Patients ● Pharmacy ● Physicians and other prescribers Legal basis of pharmaceutical analysis ● RA 10918 Philippine Pharmacy Act - Section 2. Statement of Policy.

  • The State recognizes the vital role of pharmacists in the delivery of quality health care services through the provision of safe, effective, and quality pharmaceutical products, pharmaceutical care, drug information, patient medication counseling, and health promotion. ● RA 3720 Food, Drug, and Cosmetic Act - Chap. 2, sec. 2 & 3
  • An act to ensure the safety and purity of foods, drugs, and cosmetics being made available to the public by creating the food and drug administration which shall administer and enforce the laws pertaining thereto ● RA 9711 FDA Act of 2009 - Section 3
  • an act strengthening and rationalizing the regulatory capacity of the bureau of food and drugs (BFAD) by establishing adequate testing laboratories and field offices, upgrading its equipment, augmenting its human resource complement, giving authority to retain its income, renaming it the food and drug administration (FDA), amending certain sections of republic act no. 3720, as amended, and appropriating funds thereof

Quality assurance for quality drugs Shewart cycle considered a project planning tool, it is a four-step model for carrying out change; should be repeated again and again for continuous Improvement Goals of Medicine QA Programs To make certain that each medicine reaching a patient is safe, effective, and of standard quality ● Obtaining quality products that are safe and effective through structured selection and procurement methods ● Maintaining quality products through the appropriate storage, distribution, monitoring, and use by prescribers, dispensers, and consumers A product always contains API and excipient.

  • it serves as a unique and universal identifier of chemicals

PRINCIPLES OF VOLUMETRY

Volumetry: An analytical method in which the volume of a standard solution consumed is taken as a measure of the amount of active ingredient/ constituent in a sample being analyzed STANDARD SOLUTION /TITRANT

  • A solution in which the concentration is accurately known ANALYTE / SAMPLE
  • Active constituent in a sample/ chemical substance being analyzed. INDICATOR pH indicator = are organic substances which may be acids or bases themselves, capable of existing in two forms of different colors that are mutually convertible, one into the other, at given hydrogen ion concentrations. Sampling as a process/technique:
  • Sampling is a method of studying from a few selected items, instead of the entire big number of units. The small selection is called sample EQUIVALENCE POINT/STOICHIOMETRIC POINT:
  • The theoretical point in a reaction when the added titrant is chemically equivalent to the analyte in the sample
  • This is non observable

INDICATORS:

are organic substances which may be acids or bases themselves, capable of existing in two forms of different colors that are mutually convertible, one into the other, at given hydrogen ion concentrations. Criteria of a good indicator:

  • Should show a sharp contrast between the two colors that it exhibits in different conditions;
  • The change in color should take place over a small change in pH/condition Requirements to be Met for Reactions in Volumetry
  • Reaction must be complete
  • Reaction must proceed in a stoichiometric manner
  • There should be available end point detecting device
  • For direct titration, reaction should be rapid so a sharp end point is discernible
  • At the end point, equivalent of the titrant and analyte must have reacted
  • Volumetric reactions where stoichiometric point deviates from the end point is not acceptable.
  • The concentration of the titrant is usually expressed as Normality
  • The equivalent point is not visible by the naked eye.
  • End point in titration is always indicated by a change of color of the reaction mixture. False
  • Criteria that must be possessed by a good indicator for volumetric analysis.
  • sensitive enough
  • the color exhibits under different conditions are contrasting
  • In neutralization reaction, the end point is indicated by a change in color due to change in pH
  • Equivalent weight is computed as molecular weight of a substance/ # of H/OH/+-
  • Standardization is the process of determining the exact concentration of solute.
  • In volumetry, the volume of the titrant consumed up to end point shall be used in computing for the purity of the sample/analyte.
  • The following employ the principle of volumetry
  • Precipitimetry
  • Compleximetry
  • Acidimetry
  • The weight of a substance that is chemically equivalent to 1 ml of a standard solution is called Titrant
  • Stoichiometry point is the theoretical point where equal volumes of the analyte and titrant have reacted. False
  • A good sampling process ensures success to the analysis by providing a portion sample that is representative of the entire analyte
  • The essentials in volumetry
  • titrant, indicator, analyte Introduction to Acidimetry Acidimetric analysis (in Aqueous Medium) is one of the volumetric methods of analysis. The reaction involved is neutralization and it makes use of a standard acid solution to determine the purity of alkaline/alkali salt samples either by direct method or residual method.
  • refers to the analysis of base or basic salts using standard acid solution Other methods that employ the principle of Acidimetry are:
  1. Kjeldahl Method
  2. Double Indicator Method NITROGEN DETERMINATION BY KJELDAHL METHOD An acidimetric (Kjeldahl) method used to determine the nitrogen content of organic and inorganic compounds and samples. It is an official method and it is described in different normatives such as AOAC, USEPA, ISO, DIN, Pharmacopeias and different European Directives. The Kjeldahl procedure involves three major steps: Digestion - The decomposition of nitrogen in organic samples utilizing a concentrated acid solution. This is accomplished by boiling a homogeneous sample in concentrated sulfuric acid. The end result is an ammonium sulfate solution. Distillation - Adding excess base to the acid digestion mixture to convert NH4 + to NH3, followed by boiling and condensation of the NH3 in a receiving solution.

Certain indicators change color at different stages of a neutralization reaction This phenomenon is made use

DOUBLE INDICATOR TITRATION

  • in volumetric work, this is used to determine the proportion of the components of certain

mixtures by observing two end points in a single titration.

Example: CO 3 = + H HCO 3 HCO 3 + H H 2 CO 3 -- H 2 O + CO 2

COMBINATION

(Aqueous Medium)

  • refers to the analysis of acids and/or acid salts using standard alkali solution Alkalimetry is a volumetric method that involves neutralization reaction similar to Acidimetry. In this method, a standard alkali solution serves as the titrant to determine the purity of acid or acid salt samples.