{"product_id":"208-3376-050-seven-inch-column","title":"1–5 L Caps, PP, Natural — 208-3376-050 | 200\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e7\" Polystyrene SPE Columns with Coarse Filter (90–135 µm) — Natural, 200\/Bag (208-3376-050)\u003c\/h2\u003e\n\u003cp\u003eThese 7\" polystyrene solid-phase extraction columns feature an integrated coarse filter disk rated at 90–135 microns, making them the right choice for high-particulate, complex-matrix samples where finer frits would blind prematurely. Supplied non-sterile in 200\/Bag format, part number 208-3376-050 is designed for preparative-scale SPE, high-volume environmental water sampling (1–5 L loads), and difficult upstream matrices such as soil extracts, bioreactor broths, and cell lysates that precede GC-MS or LC-MS analysis. The 7\" body length provides the largest standard sorbent bed volume in the Caplugs® Evergreen column line, delivering retention capacity and wash-step separation that shorter columns cannot match when sample load or matrix complexity demands it.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e208-3376-050\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Length\u003c\/td\u003e\n\u003ctd\u003e7\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Grade\u003c\/td\u003e\n\u003ctd\u003eCoarse — 90–135 microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolystyrene (PS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eNatural\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eNon-Sterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e200\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBPA \/ Phthalate Status\u003c\/td\u003e\n\u003ctd\u003eBPA-Free, Phthalate-Free\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-volume environmental water SPE cleanup with 1–5 L sample loads where maximum bed volume prevents analyte breakthrough\u003c\/li\u003e\n\u003cli\u003eSoil and sediment extract cleanup prior to GC-MS or LC-MS, where the 7\" bed retains analytes across complex organic matrices\u003c\/li\u003e\n\u003cli\u003eBioreactor broth and cell lysate clarification — the 90–135 µm coarse pore size passes high suspended-solid loads without clogging\u003c\/li\u003e\n\u003cli\u003ePreparative-scale pharmaceutical SPE for fraction collection and method scale-up from mini columns\u003c\/li\u003e\n\u003cli\u003eFood and agricultural residue QC — pesticide, mycotoxin, and veterinary drug preparation in high-throughput labs\u003c\/li\u003e\n\u003cli\u003eGravity-flow and vacuum manifold workflows requiring maximum throughput in dirty matrices\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eChemical Resistance\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eReagent \/ Condition\u003c\/th\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAqueous buffers and saline\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute acids and bases\u003c\/td\u003e\n\u003ctd\u003eGood — routine SPE concentrations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethanol (up to ~50%)\u003c\/td\u003e\n\u003ctd\u003eGood — within typical SPE organic modifier range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAcetone \/ chloroform \/ aromatic solvents\u003c\/td\u003e\n\u003ctd\u003eNot recommended — PS is susceptible to attack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEthanol (\u0026gt;70%) \/ high-concentration alcohols\u003c\/td\u003e\n\u003ctd\u003eNot recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoclave \/ high heat\u003c\/td\u003e\n\u003ctd\u003eNot suitable — PS is not autoclavable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003eMade in USA, these columns are produced by Caplugs® Evergreen under ISO 9001 quality management from FDA-compliant, BPA-free, phthalate-free polystyrene resin. The integrated filter disk is molded directly into the column body — not adhesive-bonded — eliminating frit-interface extractables that would interfere with sensitive LC-MS or enzyme-based detection. LabSupplies.com is an authorized Caplugs® Evergreen dealer and ships from USA inventory, typically same business day for stocking items, with volume pricing available for high-throughput labs and institutional procurement. Labs requiring a different frit porosity can select the 7\" medium-filter (45–90 µm) or 7\" fine-filter (15–45 µm) variants in the same PS\/Natural format.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhy choose the coarse (90–135 µm) filter over a finer grade?\u003c\/strong\u003e\u003cbr\u003eThe coarse filter is specifically designed for high-particulate matrices — soil extracts, cell lysates, bioreactor broths, and turbid environmental water samples — where finer frits (45–90 µm or 15–45 µm) would blind within the first few samples of a batch run, reducing throughput and increasing per-sample cost. If your matrix is relatively clean, a medium or fine filter may provide better particle retention.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill these columns fit standard SPE manifolds?\u003c\/strong\u003e\u003cbr\u003eThe 7\" body is sized for large-format vacuum SPE manifolds (typically 20-port or 24-port tube-format configurations) and standard large-format gravity-flow bench stands. Confirm your manifold or stand accepts 7\" tube-format columns before ordering, as some systems are configured only for shorter 3\" or 5\" columns.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these columns compatible with high-organic-content mobile phases?\u003c\/strong\u003e\u003cbr\u003ePolystyrene performs well with aqueous buffers and dilute organic modifiers such as methanol up to approximately 50%. It is not recommended for use with acetone, chloroform, high-concentration alcohols, or aromatic and chlorinated solvents, which can attack the PS matrix and introduce extractables into the eluate.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these columns sterile, and can they be autoclaved?\u003c\/strong\u003e\u003cbr\u003eThese columns are supplied non-sterile. Polystyrene is not autoclavable, so heat sterilization is not an option. For workflows requiring sterile consumables, consult your lab's cold-sterilization protocols and verify solvent compatibility before use.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"7\\\" Polystyrene SPE Columns, Coarse Filter 90–135 µm, Natural — 200\/Bag\",\"sku\":\"2083376050E1\",\"mpn\":\"208-3376-050\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polystyrene (PS)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"194.10\",\"availability\":\"https:\/\/schema.org\/InStock\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Why choose the coarse (90–135 µm) filter over a finer grade?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The coarse filter is designed for high-particulate matrices — soil extracts, cell lysates, bioreactor broths, and turbid environmental water samples — where finer frits would blind within the first few samples of a batch run. If your matrix is relatively clean, a medium or fine filter may provide better particle retention.\"}},{\"@type\":\"Question\",\"name\":\"Will these columns fit standard SPE manifolds?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The 7\\\" body is sized for large-format vacuum SPE manifolds (typically 20-port or 24-port tube-format configurations) and standard large-format gravity-flow bench stands. Confirm your manifold or stand accepts 7\\\" tube-format columns before ordering, as some systems are configured only for shorter 3\\\" or 5\\\" columns.\"}},{\"@type\":\"Question\",\"name\":\"Are these columns compatible with high-organic-content mobile phases?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Polystyrene performs well with aqueous buffers and dilute organic modifiers such as methanol up to approximately 50%. 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