Purospher STAR vs LiChroCART: Which HPLC Column Fits Your Method?

If you buy HPLC columns, you have seen both names on the same box. So people ask a fair question. Is Purospher STAR fighting against LiChroCART? Or are they the same thing?

Here is the short answer. They are not rivals. They are two different parts of one column. LiChroCART is the shape and hardware of the column. Purospher STAR is the material inside that does the real work. Many columns are sold as both at once, like "Purospher STAR RP-18 LiChroCART 125-3."

This post makes the difference clear. Then it helps you pick the right setup for your method.

What is Purospher STAR?

Purospher STAR is a packing material. This is the tiny powder that fills the column. In HPLC, this powder is called the stationary phase. Your sample flows through it and gets pulled apart into clean, separate peaks.

Purospher STAR is made from high-purity silica. It is metal-free. That low metal level is a big deal. Metal traces cause bad peak shape, tailing, and messy results. Because Purospher STAR keeps metals low, you get sharp peaks and steady runs.

A few key facts:

• It comes in reversed phase types like RP-18 (C18) and RP-8 (C8).
• It is endcapped, which helps stop peak tailing.
• It works across a wide pH range, about pH 1.5 to 10.5.
• It is made by Merck (sold under the Supelco brand).

In plain words, Purospher STAR is the "engine." It decides how well your compounds split apart.

What is LiChroCART?

LiChroCART is not a packing. It is the column format. Think of it as the body and holder system.

A LiChroCART column is a cartridge. A cartridge is a small tube of packing with no end fittings of its own. You cannot run it alone. You slide it into a holder called manuCART. The holder seals it and lets you connect it to your HPLC system.

Why do labs like this system?

• You swap only the cartridge, not the whole hardware. This saves money over time.
• The manuCART holder is reusable.
• Changing columns is quick and simple.

But there is one limit to know. A LiChroCART cartridge in a manuCART holder is hand-tight only. So it has a pressure ceiling of about 250 bar. If your method runs at very high pressure, this format may not fit.

So what is the real choice?

Since Purospher STAR is the packing and LiChroCART is the format, the true decision has two parts.

Part 1: Pick your phase (the packing). Here the real comparison is Purospher STAR against older Merck phases like LiChrospher. Purospher STAR is the newer, higher-purity option. It gives better peak shape and works at higher pH. LiChrospher is an older classic phase and is still used in many set methods.

Part 2: Pick your format (the hardware). Here the real comparison is LiChroCART against Hibar. LiChroCART is the cartridge format with a pressure limit near 250 bar. Hibar RT is a ready-to-use column with fittings built in. Hibar handles higher pressure. So Hibar suits fast methods and UHPLC-style work.

Purospher STAR vs LiChroCART at a glance

Point | Purospher STAR | LiChroCART | What it is | The packing (stationary phase) | The column format (cartridge + holder) | Main job | Separates your compounds | Holds the packing and connects to the system | Common types | RP-18, RP-8, NH2 | Cartridge sizes like 125-3, 250-4 | Pressure limit | Set by the format used | About 250 bar (hand-tight) | Best when | You need sharp peaks and steady runs | You want low-cost cartridge swaps

The main thing to remember: you do not choose one over the other. You choose a phase and a format together.

Which one fits your method?

Use these simple checks.

Choose Purospher STAR (as your phase) when:

• You need clean, sharp peaks with little tailing.
• Your sample has basic compounds that need a stable, high-purity phase.
• You run methods that touch higher pH.
• You want a modern phase that holds up over many runs.

Choose the LiChroCART format when:

• Your method runs at normal pressure, under 250 bar.
• You want to save money by swapping cartridges.
• You already use a manuCART holder.

Skip the LiChroCART format and pick Hibar when:

• Your method runs at high pressure.
• You do fast or UHPLC-style separations.
• You want built-in fittings and no separate holder.

For most standard reversed phase work in a pharma QC lab, a Purospher STAR RP-18 in a LiChroCART cartridge is a strong, safe pick. It gives good peaks and keeps costs down.

A quick example

Say you run a simple assay for a drug tablet. Your pressure sits near 180 bar. You want sharp peaks and low cost.

A Purospher STAR RP-18 endcapped cartridge in LiChroCART format works well here. You get the clean peaks from the phase. You get the low running cost from the cartridge system. And 180 bar is safely under the 250 bar limit.

Now say you switch to a fast method at 400 bar. The LiChroCART format cannot take that. You keep the Purospher STAR phase but move to a Hibar format. Same great peaks, but now the hardware can handle the pressure.

Frequently asked questions

Is Purospher STAR the same as LiChroCART?

No. Purospher STAR is the packing inside the column. LiChroCART is the cartridge format that holds a packing. They often come together in one product.

Can I use Purospher STAR without LiChroCART?

Yes. The same Purospher STAR phase is also sold in the Hibar format, which has its own fittings and a higher pressure limit.

Do I need a manuCART holder?

Only for LiChroCART cartridges. The cartridge has no fittings, so it needs the holder to seal and connect.

What pressure can LiChroCART handle?

About 250 bar when hand-tight in a manuCART holder. For higher pressure, choose Hibar.

Which is better for a class of basic drugs?

Purospher STAR is a good choice. Its high-purity, metal-free silica helps stop tailing with basic compounds.