LipoSolve Formulation Studio

A premium, interactive Single Page Application (SPA) designed for formulation scientists working on liposome encapsulation of small molecule drugs.

---

🧪 Scientific & Mathematical Foundations

This calculator computes absolute concentrations, molar distributions, and drug-to-lipid metrics using two core models:

Model A: Direct Concentration Input

Used when absolute mass concentrations (mg/mL) of all lipid elements are known.

1. Total Lipid Mass Concentration ($C_{\text{total}}$): $$C_{\text{total}} = \sum_{i} C_i \quad (\text{mg/mL})$$
2. Individual Lipid Molar Concentration ($M_i$): $$M_i = \frac{C_i}{MW_i} \times 1000 \quad (\text{mM})$$
3. Total Lipid Molar Concentration ($M_{\text{total}}$): $$M_{\text{total}} = \sum_{i} M_i \quad (\text{mM})$$
4. Composition Percentages: $$\text{Weight } %i = \left( \frac{C_i}{C{\text{total}}} \right) \times 100$$ $$\text{Mole } %i = \left( \frac{M_i}{M{\text{total}}} \right) \times 100$$

---

Model B: Percent Composition Input

Used to solve the complete formulation matrix when only one reference lipid's absolute concentration is known, along with the desired relative molar percentage (mol%) of every lipid component (where the percentages sum exactly to 100%).

1. Reference Molar Concentration ($M_{\text{ref}}$): $$M_{\text{ref}} = \frac{C_{\text{ref}}}{MW_{\text{ref}}} \times 1000 \quad (\text{mM})$$
2. Total Lipid Molar Concentration ($M_{\text{total}}$): Given reference molar percent $p_{\text{ref}}$, the total molarity is: $$M_{\text{total}} = \frac{M_{\text{ref}}}{p_{\text{ref}} / 100} = \frac{M_{\text{ref}} \times 100}{p_{\text{ref}}} \quad (\text{mM})$$
3. Other Components ($i \neq \text{ref}$):
   • Molar concentration: $M_i = M_{\text{total}} \times \left( \frac{p_i}{100} \right) \quad (\text{mM})$
   • Mass concentration: $C_i = \frac{M_i \times MW_i}{1000} \quad (\text{mg/mL})$
4. Total Lipid Mass Concentration ($C_{\text{total}}$): $$C_{\text{total}} = \sum_i C_i \quad (\text{mg/mL})$$

---

Drug-to-Lipid Ratios

Ratios are computed to evaluate the loading efficiency of the liposome core:

• Weight/Weight Ratio (w/w): $$\text{Ratio} = \frac{C_{\text{drug}}}{C_{\text{total_lipid}}}$$ Displayed in format 1 : X where $X = \frac{1}{\text{Ratio}}$.

• Molar Ratio (mol/mol): First calculate drug molarity: $M_{\text{drug}} = \frac{C_{\text{drug}}}{MW_{\text{drug}}} \times 1000$ $$\text{Ratio} = \frac{M_{\text{drug}}}{M_{\text{total_lipid}}}$$ Displayed in format 1 : Y where $Y = \frac{1}{\text{Ratio}}$.

---

Wet Lab Batch Preparation Weighing Calculator

To facilitate the transition from theoretical calculation to physical execution, the LipoSolve Formulation Studio includes a dynamic batch weighing calculator.

Given a target formulation batch volume ($V_{\text{batch}}$ in mL) and solved lipid mass concentrations ($C_i$ in mg/mL), the exact dry mass ($m_i$ in mg) of each lipid component required to weigh out on a balance is calculated as: $$m_i = C_i \times V_{\text{batch}} \quad (\text{mg})$$

This ensures that the final mass concentration and relative molar distribution of all bilayer elements are maintained perfectly when preparing liquid liposome dispersions in the laboratory.

---

🔬 Lipid Reference Directory

The following industry-standard lipids are pre-coded for instant access:

Abbreviation	Full Name	Standard MW (g/mol)
DSPC	1,2-distearoyl-sn-glycero-3-phosphocholine	790.16
DPPC	1,2-dipalmitoyl-sn-glycero-3-phosphocholine	734.05
Cholesterol	Cholesterol	386.65
MPEG2K-DSG	1,2-distearoyl-sn-glycerol-methoxyethylene glycol 2000	2660.00
MPEG2K-DMG	1,2-dimyristoyl-sn-glycerol-methoxyethylene glycol 2000	2509.20
MPEG2K-DSPE	1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000]	2805.50

Note: Scientists can select "Custom Lipid" and modify the molecular weight dynamically to model specific PEG distributions or novel lipid derivatives.

---

🖨️ Professional Printing

The application includes high-fidelity print-specific stylesheets (@media print). When you click Export Lab Report or press Cmd+P/Ctrl+P, the application automatically hides input controls, adjusts the theme to high-contrast monochrome, and prints a pristine lab sheet suitable for notebook inclusion or project reviews.