# Gold Standard Analytics > Analytical testing laboratory in Houston, Texas, filmed end to end (est. January 2026). HPLC-UV/DAD, LC-MS/MS, GC-MS, ICP-MS, endotoxin (LAL) and USP <71> sterility testing for peptides, SARMs, kratom, hemp, supplements, cosmetics, raw materials and environmental samples. Every certificate of analysis is publicly verifiable by accession number and carries a SHA-256 hash. Operated to ISO/IEC 17025 expectations; not accredited. Key facts: 5151 Mitchelldale St A10 STE B, Houston, TX 77092. team@goldstandardanalytics.com. Standard turnaround 5–7 business days. Chain-of-custody video and photos retained three years. Samples retained 90 days. No walk-in drop-off; mail-in only. Prices are per sample and published on each service page. ## Start here - [Homepage](https://www.goldstandardanalytics.com/): what the lab tests, instruments, quality program, guarantee - [Verify a certificate](https://www.goldstandardanalytics.com/verify): enter an accession number (format GSA-2026-018432) - [Public COA library](https://www.goldstandardanalytics.com/verify#library): every certificate, searchable - [Submit samples](https://www.goldstandardanalytics.com/sample-intake): account, services, samples, panels, payment - [About and contact](https://www.goldstandardanalytics.com/about) - [Careers](https://www.goldstandardanalytics.com/careers) ## Services - [Peptide purity, identity and net content testing](https://www.goldstandardanalytics.com/services/peptide-testing): from $189 per sample - [SARMs and research-compound potency and identity testing](https://www.goldstandardanalytics.com/services/sarms-testing): from $149 per sample - [Kratom alkaloid, heavy-metal and microbial testing](https://www.goldstandardanalytics.com/services/kratom-testing): from $139 per sample - [Hemp cannabinoid potency, total THC and contaminant testing](https://www.goldstandardanalytics.com/services/hemp-cbd-testing): from $79 per sample - [Dietary supplement label-claim, heavy-metal and microbial testing](https://www.goldstandardanalytics.com/services/dietary-supplement-testing): from $119 per sample - [Cosmetic and skincare active potency, preservative efficacy and microbial testing](https://www.goldstandardanalytics.com/services/cosmetics-testing): from $159 per sample - [Raw material and API identity, assay, residual solvents and water testing](https://www.goldstandardanalytics.com/services/raw-material-api-testing): from $149 per sample - [Petroleum hydrocarbon, BTEX and PAH testing in soil, water and oil](https://www.goldstandardanalytics.com/services/hydrocarbon-testing): from $205 per sample - [Multi-residue pesticide testing in produce, botanicals, soil and water](https://www.goldstandardanalytics.com/services/pesticide-residue-testing): from $205 per sample - [Drinking water, food and beverage testing for metals, PFAS and mycotoxins](https://www.goldstandardanalytics.com/services/water-food-beverage-testing): from $165 per sample ## Programs - [Group testing](https://www.goldstandardanalytics.com/group-testing): 2–50 people split one sample and one fee - [Refer and earn](https://www.goldstandardanalytics.com/refer): 20% of a referral's first order, 10% after - [Shop used lab equipment](https://www.goldstandardanalytics.com/shop) and [sell on the marketplace](https://www.goldstandardanalytics.com/sellers) ## Laboratory notes - [How to read our certificates of analysis](https://www.goldstandardanalytics.com/notes/how-to-read-our-coas): A Gold Standard certificate has a fixed structure: header, sample identity, method block, results table, chain-of-custody record and signature. Here is what each part means and how to check it. - [DAD vs VWD in HPLC: what the detector changes about a purity number](https://www.goldstandardanalytics.com/notes/dad-vs-vwd-hplc): Both detectors measure UV absorbance. One measures it at a single wavelength; the other captures a full spectrum at every point of the chromatogram. That difference decides whether a purity result can tell you what the impurities are. - [ISO/IEC 17025 accreditation: what it means and what it does not](https://www.goldstandardanalytics.com/notes/iso-17025-accreditation-explained): ISO/IEC 17025 is the international standard for testing laboratory competence. Accreditation is a third-party audit against it. We operate to its expectations and are not accredited; here is exactly what each phrase means. - [USP <71> sterility vs bioburden: they answer different questions](https://www.goldstandardanalytics.com/notes/usp-71-sterility-vs-bioburden): Sterility testing asks whether any viable organism is present in the units tested. Bioburden counts how many are there. For an injectable, only one of these is the release test. - [Why endotoxin is tested by kinetic chromogenic LAL, and what a PPC is](https://www.goldstandardanalytics.com/notes/why-endotoxin-lal-kinetic): Endotoxin is the cell-wall fragment of gram-negative bacteria that causes fever in an injection even when nothing is alive. USP <85> sets the test; the positive product control is the part that proves the test worked in your sample. ## Lab comparisons - [Janoshik Analytical vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/janoshik) - [Freedom Diagnostics vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/freedom-diagnostics) - [Vanguard Laboratory vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/vanguard) - [ILS Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/ils-labs) - [Kovera Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/kovera) - [Axiom Analytics vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/axiom-analytics) - [Synthesyx Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/synthesyx) - [KMD Analytical vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/kmd-analytical) - Optiq Health Labs vs Gold Standard Analytics: https://www.goldstandardanalytics.com/compare/optiq-health-labs - [BioRegen vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/bioregen) - [Ethos Analytics vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/ethos-analytics) - [MZ Biolabs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/mz-biolabs) - [Peptide Test vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/peptide-test) - [Chromate vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/chromate) - [MDx BioAnalytical Laboratory vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/mdx-biolabs) - [ACS Peptide Testing Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/acs-labs) - [Horizon Analytical vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/horizon-analytical) - [ZyntroTest vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/zyntro) - [SteriGenix Analytical vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/sterigenix) - [Prodigy Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/prodigy-labs) - [Krause Analytical vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/krause) - [TrustPointe Analytics vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/trustpointe) - [BTLabs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/bt-labs) - [Eagle Analytical vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/eagle-analytical) - [Bioviridian vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/bioviridian) - [SC Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/sc-labs) - [Kaycha Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/kaycha-labs) - [ACS Laboratory (Smithers) vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/acs-laboratory) - [ACT LAB vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/act-lab) - [MCR Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/mcr-labs) - [Infinite Chemical Analysis Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/infinitecal) - [Steep Hill Illinois vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/steep-hill-illinois) - [Steep Hill Mississippi vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/steep-hill-mississippi) - [KCA Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/kca-laboratories) - [ProVerde Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/proverde) - [Green Leaf Lab vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/green-leaf-lab) - [ChemHistory vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/chemhistory) - [New Bloom Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/new-bloom-labs) - [Altitude Consulting vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/altitude-consulting) - [PharmLabs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/pharmlabs) - [Anresco Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/anresco) - [Marin Analytics vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/marin-analytics) - [Bluebonnet Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/bluebonnet-labs) - [Delta 9 Analytical vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/delta-9-analytical) - [Murray-Brown Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/murray-brown) - [Alkemist Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/alkemist) - [Cambium Analytica vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/cambium-analytica) - [PharmLabs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/pharmlabs-kratom) - [SC Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/sc-labs-kratom) - [Anresco Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/anresco-kratom) - [Columbia Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/columbia-laboratories) - [ACS Laboratory (Smithers) vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/acs-laboratory-kratom) - [Altitude Consulting vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/altitude-consulting-kratom) - [Analytical Resource Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/analytical-resource-labs) - [ACT LAB vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/act-lab-kratom) - [Alliance Analytical Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/alliance-analytical) - [ProVerde Laboratories vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/proverde-kratom) - [Wonderland Labs vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/wonderland-labs) - [Delta 9 Analytical vs Gold Standard Analytics](https://www.goldstandardanalytics.com/compare/delta-9-analytical-kratom) ## Guides - [Is this COA real? Fake certificate checker](https://www.goldstandardanalytics.com/fake-coa-checker) - [How much does peptide testing cost?](https://www.goldstandardanalytics.com/peptide-testing-cost) - [Third-party supplement testing for brands](https://www.goldstandardanalytics.com/third-party-supplement-testing) - [USP <71> sterility testing](https://www.goldstandardanalytics.com/usp-71-sterility-testing) - [USP <85> endotoxin testing](https://www.goldstandardanalytics.com/endotoxin-testing-service) - [Mail-in testing by city](https://www.goldstandardanalytics.com/locations) ## Developers - [Developer overview](https://www.goldstandardanalytics.com/developers) - [API reference (Markdown)](https://www.goldstandardanalytics.com/api/API.md) - [OpenAPI 3.1](https://www.goldstandardanalytics.com/api/openapi.json) - [MCP server manifest](https://www.goldstandardanalytics.com/api/mcp-manifest.json) - [Public COA library exports](https://www.goldstandardanalytics.com/api/coa/index.json): JSON, NDJSON, CSV, one file per certificate, CC BY 4.0, no key ## Policies - [Terms of service](https://www.goldstandardanalytics.com/terms) - [Refunds and guarantee](https://www.goldstandardanalytics.com/refunds) - [Privacy](https://www.goldstandardanalytics.com/privacy) - [Accessibility](https://www.goldstandardanalytics.com/accessibility) - [Compliance](https://www.goldstandardanalytics.com/compliance) ## Optional - [llms-full.txt](https://www.goldstandardanalytics.com/llms-full.txt): expanded version with service methods, instruments and FAQ answers - [API-specific llms.txt](https://www.goldstandardanalytics.com/api/llms.txt)