Dr. Vedprakash Patil College of Pharmacy, Chh. Sambhajinagar, Maharashtra, India.
The present work aim to FTIR method development of finish product anti pigmentation topical formulation using herbal product like Aloe ( Aloevera), Calendula Officinalis (Pot marigold), Lavendula angustifoli (Lavender) and Honey. The goal of review is to method development of the finished product herbal anti pigmentation topical formulation by using FTIR method. Hyperpigmentation, characterized by the excessive darkening of the skin due to melanin deposition, is a common cosmetic concern often triggered by UV radiation and hormonal changes. Fourier Transform Infrared (FTIR) spectroscopy has emerged as a powerful, rapid, non-destructive, and cost-effective analytical technique for the quality control of herbal medicines. A robust Fourier Transform Infrared (FTIR) spectroscopic method was developed to characterize functional groups, confirm ingredient identity, and evaluate potential interactions between herbal actives and excipients. The FTIR spectra exhibited characteristic peaks corresponding to major phytoconstituents, providing a reliable fingerprint for quality control. The formulation demonstrated satisfactory stability and adherence to cosmetic quality standards. Overall, the study establishes an integrated framework for quality assurance and analytical characterization of herbal topical anti-pigmentation products, reinforcing the importance of FTIR spectroscopy as a rapid, non-destructive tool for routine standardization in herbal cosmetic formulations
Pigmentation disorders, including melasma, hyperpigmentation, and post-inflammatory pigmentation, represent some of the most prevalent dermatological concerns affecting individuals worldwide. Conventional treatments often rely on synthetic agents such as hydroquinone,kojic acid, and retinoids; however, long-term use of these compounds may be associated with adverse effects including irritation, rebound pigmentation, and potential toxicity. As a result, there has been growing interest in herbal and plant-based alternatives that offer safer and more biocompatible depigmenting activity with minimal side effects. Herbal formulations rich in phenolics, flavonoids, and antioxidant constituents have gained prominence due to their ability to inhibit tyrosinase activity, reduce melanin synthesis, and promote overall skin rejuvenation.
Quality control and standardization of herbal cosmetic preparations remain a major challenge due to the inherent variability of plant-derived ingredients and the complexity of multi-component formulations. Ensuring batch-to-batch consistency requires robust analytical tools capable of verifying the identity, purity, and performance of both raw materials and finished products. In this context, Fourier Transform Infrared (FTIR) spectroscopy has emerged as a rapid, non-destructive, and highly reliable technique for the qualitative and semi-quantitative assessment of herbal formulations. FTIR allows the identification of functional groups, detection of molecular interactions between actives and excipients, and establishment of characteristic spectral fingerprints essential for routine quality assurance. The demand for herbal anti-pigmentation products has surged, driven by the increasing consumer preference for natural alternatives to conventional skin lightening agents, which are often associated with side effects. Herbal formulations, targeting issues like melasma and dark spots, typically contain complex mixtures of plant extracts known for their antioxidant and melanin-regulating properties (e.g., Turmeric, Aloe Vera, Lavender, Calendula). However, the efficacy and safety of these products rely heavily on strict quality control. The complex, multi-component nature of herbal products makes authentication, stability monitoring, and detection of adulteration. unauthorized addition of synthetic, regulated drugs.
HERBAL CREAM:
Herbal formulations is defines as dosage form containing of one or more herbs or processed in determined quantity to provide specific nutritional cosmetic benefits meant for use to diagnose, treat, mitigate, disease of a person or animal. Herbal products or herbal formulations have less side effects. Different herbal formulations include tinctures extracts essential oils, expressed juices, exudates and powdered extracts. Developing herbal drug involves collection and authentication of the material. Herbal cream is semi-solid formulation intended for topical application. The cream formulation is prepared by using various herbal extracts, almond oil and various excipient. Pharmacognostic, phytochemical and pharmacological evaluation and standardization.
Uses herbal cream in pigmentation:
1. Lightening Dark Spots
2. Treating Hyperpigmentation.
3. Healing Sunburn and UV Damage
4. Reducing Acne and Post-Acne Marks
HERBAL INGREDIENTS USED IN TREATMENT OF ANTI PIGMENTATION
Following are the herbal ingredients used in preparation of polyherbal cream
1. Aloe (Aloevera)
2. Calendula officinalis (Calendula)
3. Lavendula angustifoli (Lavender)
4. Curcuma longa (Turmeric)
5. Honey
FTIR METHOD DEVELOPMENT:
1. Sample Preparation:
FTIR sample prep depends on the formulation type:
a) Cream/Gel/Lotion (semi-solid)
1. Direct ATR method (preferred):
2. KBr pellet method (if ATR is unavailable):
b) Ointment (lipophilic bases)
3. Instrument Parameters
Method and Preparations:
Step 1: Identify Characteristic Peaks
Step 2: Analyze Formulation
Step 3: Check for Interactions
For example:
Step 4: Create Reference Library
4. Validation Parameters (as per ICH Q2 (R1))
|
Parameter |
FTIR Approach |
|
Specificity |
Confirm that peaks of actives are distinguishable from excipients |
|
Precision (repeatability) |
Measure the same sample multiple times; compare peak positions |
|
Robustness |
Slight changes in sample thickness, ATR pressure, or instrument settings |
|
Linearity/Quantitation |
Optional; can use peak area ratios for semi-quantitative purposes |
Procedure:
ATR-FTIR METHOD:
1. Instrument Performance Verification:
Ensure the FTIR instrument and ATR accessory are calibrated. Wavenumber accuracy and spectral resolution are typically checked using a NIST-traceable polystyrene film standard.
Log in and allow the system to pass performance tests.
2. ATR Crystal Preparation and Background Measurement:
Clean the ATR crystal (e.g., diamond, ZnSe) with an appropriate solvent like alcohol or acetone and a lint-free wipe to remove any residue. Run a background spectrum measurement with the clean, empty crystal to subtract atmospheric interferences (like water vapor and \(\text{CO}_{2}\)) from the sample spectra.
3. Sample Application:
Place a small amount (around 10 mg) of the topical formulation (cream, gel, ointment) directly onto the center of the ATR crystal. For semi-solid samples, ensure sufficient and consistent contact with the crystal surface, often by using an anvil with appropriate pressure. Consistent pressure is crucial for reproducible results.
4. Spectra Acquisition:
Optimize instrumental parameters like the number of scans (e.g., 32 scans/minute), resolution (e.g., 4 or 8 cm?¹), and spectral range (e.g., 4000–400 cm?¹). Acquire the sample spectrum using the instrument's software. The spectrum is typically displayed in absorbance mode.
5. Qualitative Analysis and Data Processing:
Identify characteristic peaks for the active pharmaceutical ingredient (API) and excipients to confirm chemical identity and check for interactions or polymorphic changes (e.g., crystallization). Apply pre-processing techniques as needed, such as baseline correction, smoothing, and normalization, to enhance spectral quality and minimize artifacts.
6. Quantitative Analysis (if applicable):
Prepare a calibration curve using a series of standard concentrations of the API in a suitable matrix or solvent. Measure the absorbance of characteristic peaks for each standard and plot against concentration to establish a linear relationship (Beer-Lambert law). Use chemometric methods like Partial Least Squares (PLS) or Principal Component Regression (PCR) for complex formulations where spectral overlap may occur.
7. Method Validation:
Validate the method according to regulatory guidelines (e.g., ICH or FDA) for parameters including selectivity, linearity, accuracy, precision, and limits of detection/quantification (LOD/LOQ).
Specificity is confirmed by ensuring no interference from excipients is observed at the chosen analytical wavelength.
8. Application:
The validated method is then used for quality control, stability studies, or monitoring dynamic processes like drug release into a medium or penetration into a membrane.
CONCLUSION
The developed FTIR methodology provides a rapid, reliable, and non-destructive approach to identify key herbal actives in the finished topical formulation.It enables the detection of functional groups, verification of active ingredients, and monitoring of potential interactions with excipients. This method ensures batch-to-batch consistency and serves as an effective quality control tool, complementing other quantitative analytical techniques for comprehensive evaluation of herbal anti-pigmentation products.
ACKNOWLEDGEMENTS
I express my sincere gratitude to Dr. Vedprakash Patil Pharmacy College for providing the necessary facilities and academic environment to carry out this research work entitled. I would like to convey my deep sense of appreciation and heartfelt thanks to my research guide Prof. Vaibhav Changdiye Sir for their invaluable guidance, constant encouragement, and constructive suggestions throughout the course of this work. Their expertise and continuous support were instrumental in the successful completion of this study.
REFERENCES
Amruta Shinde, Vaibhav Changdiye, Dr. Vikas Rajurkar, Quality Assessment and ATR-FTIR Method Development of Finished Product Herbal Anti Pigmentation Topical Formulation, Int. J. of Pharm. Sci., 2026, Vol 4, Issue 2, 4067-4072. https://doi.org/10.5281/zenodo.18770801
10.5281/zenodo.18770801
