WATERS 186003900 Xbridge Column Obd C18 250

( Brand: Waters ), ( Manufacturer Part Number: 186003900 ), ( Type: Column )

Review WATERS Xbridge Prep C18 Column Obd 50mm 250

The **Waters 186003900 XBridge C18 Column (10 m, 250 mm 4.6 mm, OBD)** is a high-performance reverse-phase analytical column designed for demanding liquid chromatography applications, particularly in pharmaceutical, biopharmaceutical, and small-molecule analysis. Engineered with Waters proprietary **XBridge** technology, this column features a **fully porous, chemically bonded C18 stationary phase** embedded in a robust, high-purity silica matrix, ensuring exceptional durability, reproducibility, and chromatographic efficiency. The **10-micron particle size** provides a balanced combination of high resolution and moderate backpressure, making it ideal for routine and semi-preparative separations where speed and sensitivity are critical. With a **250 mm column length**, it delivers superior peak capacity and resolution for complex mixtures, including chiral compounds, peptides, and small organic molecules, while the **4.6 mm internal diameter** offers a versatile option for standard analytical setups. The **OBD (Open Bed Diffusion)** design enhances mass transfer efficiency by reducing band broadening, resulting in sharper peaks and improved peak symmetry, which is essential for accurate quantitation in method development and validation. Built to withstand rigorous use, the column s robust construction minimizes risk of column failure, even under high-pressure or high-flow conditions, while its **end-capped silanol groups** reduce tailing and improve retention consistency for basic and polar analytes. Whether used in gradient or isocratic elution modes, the XBridge C18 column excels in applications such as **HPLC, UHPLC, and LC-MS**, offering reliable performance across a wide range of mobile phase compositions, including aqueous-organic mixtures with buffers, acids, or salts. Its compatibility with modern HPLC systems and automated sample preparation further solidifies its role as a dependable workhorse in analytical laboratories seeking both precision and longevity in their separations.

### **Pros and Cons of buying a Waters 186003900 XBridge C18 Column (10 m, 250 4.6 mm, OBD, 50 )**

#### **Pros**

1. **High Performance for Complex Samples** The XBridge C18 column is designed for high-resolution separations, making it suitable for challenging applications such as pharmaceuticals, biologics, and environmental analysis. Its bonded C18 phase provides excellent retention and selectivity for a wide range of analytes.

2. **Wide pH Stability** The column is stable across a broad pH range (typically 1 12), allowing flexibility in mobile phase optimization without risking phase degradation. This is particularly useful for acidic or basic compounds.

3. **Consistent Retention and Efficiency** The 10 m particle size offers good peak efficiency and separation power, though not as fast as sub-2 m columns. It strikes a balance between performance and backpressure, making it suitable for conventional HPLC systems.

4. **Durability and Longevity** Waters columns are known for their reliability and durability, reducing the need for frequent replacements. Proper maintenance (e.g., avoiding high pH extremes, using appropriate mobile phases) can extend the column s lifespan significantly.

5. **Compatibility with Common HPLC Systems** The 250 4.6 mm dimensions are standard, making it easy to integrate into existing HPLC setups without requiring modifications. It works well with both isocratic and gradient elution modes.

6. **Good for Analytical and Semi-Preparative Work** While not ideal for large-scale preparative separations, it performs well for analytical and small-scale semi-preparative applications, especially in quality control and method development.

7. **Backed by Waters Support** As a reputable brand, Waters provides technical support, troubleshooting resources, and replacement parts, which can be valuable for troubleshooting issues.

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#### **Cons**

1. **Higher Cost Compared to Generic Columns** Waters columns are premium-priced, which may be a drawback for budget-conscious laboratories or those with limited funding. Generic or third-party alternatives (e.g., Phenomenex, Agilent) may offer similar performance at a lower cost.

2. **Slower Analysis Times** The 10 m particle size results in longer retention times and lower efficiency compared to sub-2 m columns (e.g., 1.7 m or 1.8 m). For high-throughput applications, faster columns may be preferable.

3. **Higher Backpressure** While not excessively high, the 10 m particle size generates more backpressure than ultra-performance liquid chromatography (UPLC) columns. This may limit its use in systems with older or less robust pumps.

4. **Not Ideal for Ultra-High-Resolution Applications** For cutting-edge separations requiring sub-2 m resolution (e.g., proteomics, metabolomics), smaller particle sizes or UPLC columns would be more appropriate.

5. **Maintenance Requirements** Like all HPLC columns, the XBridge C18 requires careful handling to avoid contamination (e.g., particulate matter, high salt concentrations) and proper storage (e.g., in mobile phase or column preservative). Neglect can lead to premature failure.

6. **Limited Availability of Replacement Parts** While Waters provides support, replacement parts (e.g., frits, connectors) may not be as readily available or as cost-effective as those for other brands.

7. **Overkill for Simple Applications** For straightforward separations (e.g., basic drug analysis with minimal interferences), a lower-cost column (e.g., a 5 m C18) might suffice without the added expense.

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### **Conclusion**

The Waters 186003900 XBridge C18 column is a high-quality, versatile choice for laboratories requiring reliable, high-performance separations in analytical and semi-preparative applications. Its pH stability, durability, and consistent performance make it a strong option for complex matrices, but its higher cost and slower analysis times compared to UPLC columns may limit its suitability for high-throughput or budget-sensitive environments.

For most academic, pharmaceutical, or clinical laboratories with moderate to high demands, this column represents a solid investment. However, if cost efficiency or speed is prioritized, alternatives like 5 m or sub-2 m columns from other manufacturers may be worth considering.

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### **Recommendation**

- You require a robust, high-performance column for challenging separations (e.g., biologics, environmental samples).

- Your laboratory values brand reliability and long-term durability.

- You are working with applications where pH flexibility and retention consistency are critical.

- Budget constraints are not a major concern, and the column s performance justifies the cost.

- You need faster analysis times (opt for a sub-2 m UPLC column).

- Your budget is limited (explore generic or mid-range C18 columns from Phenomenex, Agilent, or YMC).

- Your applications are simple and do not require the XBridge s advanced features (a 5 m C18 may suffice).

- You prioritize cost savings over brand reputation (third-party columns can offer similar performance at a lower price).

Ultimately, the decision depends on your specific analytical needs, budget, and long-term goals for the laboratory. If the XBridge C18 aligns with your requirements, it is a dependable choice. Otherwise, evaluating alternatives based on your priorities may yield a more cost-effective solution.

Details:

I purchased this secondhand column around 2012, it has been tested and never installed or used since then.

part #: 186003900 prices

• $990.00-$1539.00

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• brand: Waters
• mpn: 186003900
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